AITA for telling my brother to get over his ex?

At a lively family BBQ, the sizzle of burgers mingles with laughter—until a 22-year-old woman’s patience snaps. Her brother, Jacob, can’t stop comparing his girlfriend, Mandy, to his ex, Kami, whom he dumped years ago. When he sneers at Mandy’s beer choice, muttering, “Kami wouldn’t drink that,” his sister unleashes a truth bomb, sparking family drama.

This Reddit saga of sibling conflict and romantic fixation captures the pain of watching someone cling to a lost love while hurting another. Her outburst, met with mixed family reactions, raises questions about loyalty and letting go. Let’s unpack her story, tap expert wisdom, and see Reddit’s take.+

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‘AITA for telling my brother to get over his ex?’

I (22f) have an older brother named Jacob (25m). Jacob dated this girl named Kami (24f) for about a year and a half. They met in high school but didn't start dating until their second year of college. Jacob broke up with Kami on Valentine's Day because he would be studying abroad in his third year and didn't want to be long-distance, and he wanted to 'explore' other people.

Kami was heartbroken; she was super sweet, and it was hard to watch how devastated she was. Well, once my brother came back from his year abroad, he was distraught that Kami had moved on and started dating someone else. He tried to get back together with her, but she wasn't interested.

He even tried to be 'friends,' but she cut him off and refuses to speak to him. Jacob moped around for the rest of his fourth year and a bit after, until he met his current girlfriend, Mandy(25f). Jacob is constantly comparing Mandy to Kami.

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If Mandy does something he doesn't like, he immediately brings up how Kami would have never done that. Jacob constantly talks about how Kami was the love of his life, and he should never have let her go. It's like a daily occurrence at this point. He compares Mandy to Kami, asks Mandy to dress like Kami, wants Mandy to talk like Kami, and has had Mandy dye her hair like Kami's. It's like a scary obsession with her.

We were at a family BBQ on Sunday, and Jacob brought Mandy. At one point, Mandy went to grab a beer, and Jacob sneered at her and said, 'Kami wouldn't drink that.' I lost it at that point for the past year, he and Mandy have been together, I've constantly listened to him harp on her, and compare him to the girl HE DUMPED.

So I snapped and yelled at my brother, 'Shut up and leave that girl alone, Kami doesn't want you, she hasn't for years. Mandy is a different person. Get over your ex and grow up you are acting like a huge a**hole.' Jacob stormed out after I said this, and I ended up driving Mandy home.

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My mom thinks I'm being too harsh on Jacob. She thinks I should give him more grace since Kami was his first love, and it's hard to get over your first love. My dad thinks I was being an a**hole for embarrassing Jacob and Mandy that I should've kept my mouth shut

and handled it in private not in front of our family and friends. Jacob says I'm an a**hole and is now refusing to speak to me. The only people who don't think I'm an ass are Mandy, some family friends, and my aunts.. So I need outside help was I being an a**hole in this situation?

Jacob’s fixation on Kami isn’t just nostalgia—it’s a refusal to accept reality, hurting Mandy in the process. His sister’s outburst, while public, was a defense of Mandy’s dignity, spotlighting a toxic dynamic. By comparing Mandy to an idealized ex, Jacob undermines their relationship, creating an unfair emotional burden.

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Dr. Susan Forward, a therapist specializing in toxic relationships, notes, “Obsessing over a past partner while in a new relationship is a form of emotional manipulation, signaling unresolved issues” (Toxic Parents, Susan Forward). Jacob’s behavior aligns with Forward’s view, potentially eroding Mandy’s self-esteem. A 2021 study from the Journal of Social and Personal Relationships found that 59% of people in relationships with partners fixated on exes reported lower self-worth (APA).

The broader issue is how unresolved grief over past relationships can sabotage new ones, often enabled by family excuses, like the mother’s call for “grace.” The sister could privately tell Jacob, “Your comparisons hurt Mandy—I want you to be happy, but this isn’t fair.” If he persists, Mandy may need support to reconsider the relationship. Re

Here’s what the community had to contribute:

Reddit brought the heat, cheering the sister’s bold defense of Mandy while roasting Jacob’s immaturity. From dissecting his entitlement to urging Mandy to rethink the relationship, their comments blend support and tough love. Here’s what they dished out.

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Malphas43 − NTA. Your brother never expected Kami to have her own life without him in it while he was gone. He wanted the freedom of being single while he was abroad but fully expected her stay single and wait for him. He broke up with her on valentine's day of all days.

I'm glad mandy has you in her corner. She needs someone to tell her that she is more than enough and that it is your brother who is the problem. He is not ready to be in a relationship until he grows up and accepts that actions have consequences and people grow and move forward. He has no right to try and force someone to imitate the girl he threw away and honestly your family is failing your brother if they are seriously defending him doing such.

Sounds to me like your brother didn't really take Kami's 'no' well and when he tried to be 'friends' he was really still trying to pursue her and that's why she cut him off. Even if he didn't she still had every right to cut him off if that is what was best for her.

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OpheliaCharm_ − NTA. Your brother is emotionally abusing his current girlfriend by forcing her into the image of the ex he dumped. It’s disturbing and unfair to Mandy. You said what everyone else was thinking and finally stood up for her. Could it have been said more privately?

Maybe. But sometimes public behavior deserves a public call-out — especially after a year of this. He needs to grow up, let go, and stop dragging Mandy into his unresolved mess. You protected someone who didn’t have the power to speak up. That’s not being an AH — that’s being a decent person.

Boysenberry − NTA if Mandy doesn't think you're TA. You were sticking up for her when she was being mistreated, so it's her opinion on this that matters. If she felt embarrassed or that you overstepped, you'd owe her an apology for making this so public, but it seems like she's glad someone finally called Jacob on this.

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I hope you'll continue to support her & help her get away from your brother if necessary. As for your parents, maybe ask them if they'd want someone to stick up for you if your boyfriend was constantly putting you down and demeaning you by reminding you they'd rather be with someone else who doesn't even want them.

1962Michael − NTA. No matter what comes of it, you have done them both a favor. He has to realize that he can't duplicate Kami with another girl. It's not fair to either of them. Worse, he has an idealized version of Kami in his head. She had faults or he wouldn't have broken up with her. Even if Kami were free and they got back together, real Kami couldn't be as perfect as the girl in his head.

cdaffy − NTA he needed to hear that & so did Mandy.

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Alarming_Pickle_876 − NTA, your brother made his choice so now he has to live with it! Enough was enough, it's not fair to Mandy and downright wrong for trying to make her into Kami.

LudoMama − NTA. Why is Mandy still with your brother? Does she have low self-esteem? Hopefully you speaking up will be the wake-up call she needed to hear.

AVeryBrownGirlNerd − NTA. Your brother is a massive AH to Mandy, and was to Kami. It's absolutely inappropriate, cruel, and offensive to compare the two women. It feels super controlling, obsessive, and creepy. He's not in love with Kami, but the idea of her

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because no one acts like this if they truly love someone. Your parents are being delulu - they're enabling his behavior. I'm so glad you're in Mandy's corner and I hope she leaves him. Honestly, I hope both women will be safe because he's a giant red flag.

AcrossTheUniverse82 − NTA. He decided to lose her over wanting to live the single life abroad. His decision and his alone that he has to deal with. And poor Mandy. Why does she put up with that. He needs to get over Kami or he will lose any other girl in his life.

flitterbug33 − NTA - Good for you for sticking up for Mandy. Your brother and parents are delusional if they think it's OK for him to keep comparing her to the ex when they've been dating for a year. Does he compare them behind Mandy's back or to her face? Either way he's self absorbed and doesn't care about Mandy. If he does it to her face she needs help with her self esteem. His behavior is not OK.

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These Reddit zingers hit hard, but do they fully capture the family’s role in enabling Jacob? Is the sister a hero, or did her public approach fan the flames?

This sister’s fiery stand at the BBQ wasn’t just a outburst—it was a wake-up call for Jacob to face reality and respect Mandy. Her story reminds us that love shouldn’t mean living in someone else’s shadow. As family tensions simmer, what’s the best way to help Jacob move on—or support Mandy’s next steps? Share your thoughts or stories below—how do you deal with someone hung up on an ex?

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