AITA for ending my friendship with my best friend after finding out she got me fired by spreading rumors I had an affair with my boss?

A 29-year-old single mom recently discovered that her best friend of 10 years — someone she considered a sister — was the person who deliberately spread a vicious rumor that she was having an affair with her boss. The lie cost her her job in marketing, triggered an HR investigation, and left her unemployed and humiliated with two kids to support.

She only learned the truth when her former best friend casually confessed during drinks with mutual friends — laughing it off as “venting” because she felt neglected while the OP spent time at work. There was no real apology, just defensiveness and annoyance that the OP was “making a big deal” out of it. Devastated and betrayed, she ended the friendship on the spot. Now the ex-friend is guilt-tripping her, mutual friends are pushing for forgiveness, and she’s wondering if she overreacted by cutting off a decade-long relationship over “one mistake.”

‘AITA for ending my friendship with my best friend after finding out she got me fired by spreading rumors I had an affair with my boss?’

We’ve been best friends since high school — 10 years of shared secrets, support, everything:

So, I (29F) recently ended my 10 year friendship with my best friend Lily (30F). We’ve been close since highschool, and honestly, I thought she was like a sister to...

The rumors came out of nowhere and destroyed her career:

Last year, I lost my job. I worked in marketing at this great company and had what I thought was a good professional relationship with my boss, Mike. Out of...

At first, I thought it was just stupid gossip, but then it got serious. HR got involved, and after a lot of back and forth, I ended up getting fired...

I was totally blindsided, because the rumors weren’t true at all, and I had no idea how they even started.

The financial and emotional fallout was brutal:

Losing my job was a nightmare. I’m a single mom, so the pressure to keep things stable was already huge, and this just wrecked everything.

It was embarrassing too like, everyone believed I had this inappropriate relationship when in reality, Mike and I were strictly professional. I just couldn’t understand how it all happened.

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The confession happened casually — and cruelly:

Fast forward to a month ago, me and Lily were out with some mutual friends, just having drinks and catching up. Out of nowhere, Lily casually mentions that she was...

She was laughing, saying she didn’t mean for it to go that far, and she was just "venting" because she felt like I was spending more time at work with...

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The reaction was instant and final:

I was shocked. Like, I didn’t even know what to say. I couldn’t believe my best friend, who watched me struggle after losing my job, was the one who put...

I asked her how she could do that, and she just brushed it off, saying it wasn’t meant to be a big deal, and it’s not her fault people "overreacted."...

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That was the last straw for me. I told her I couldn’t be friends with her anymore after that, and that I needed time to process everything. She was shocked,...

She kept saying I was overreacting and that I shouldn’t throw away 10 years of friendship over "one mistake." Since then, she’s been calling and texting, trying to guilt-trip me...

Some of our mutual friends think I should just forgive her and move on, but I can’t. I feel so betrayed, and I just don’t think I can trust her...

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Now I’m wondering – am I the a__hole for ending a decade-long friendship over this? Maybe I am overreacting, but I feel like if I let this slide, I’m saying...

TL;DR: My best friend started a rumor that I was having an affair with my boss, which got me fired. When I found out, I ended our friendship. She says...

What Lily did was not a “mistake” or “venting gone wrong” — it was calculated character assassination with devastating real-world consequences. Spreading a false rumor of a workplace affair is defamation (specifically slander when spoken), and when it leads to job loss, it becomes a matter of provable damages: lost wages, career damage, emotional distress, and the ongoing stigma of being labeled unprofessional.

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The casual confession — laughing, minimizing, blaming “overreaction” — shows zero genuine remorse or understanding of the harm caused. This is classic DARVO behavior (Deny, Attack, Reverse Victim and Offender): she denies full responsibility, attacks the OP for being upset, and positions herself as the real victim of the fallout.

Relationship therapist Dr. Harriet Lerner (author of “The Dance of Connection”) emphasizes that betrayal by someone close often leaves deeper scars than betrayal by strangers precisely because of the trust that was broken. Ending a friendship in this case is not overreacting — it is a healthy boundary. Forgiveness is optional and requires sincere accountability, restitution (emotional and possibly financial), and changed behavior. None of those are present here.

The OP is a single mother who lost her livelihood because of this rumor. Protecting her peace, reputation, and children’s stability is far more important than preserving a toxic friendship. Mutual friends pushing “forgive and move on” are often prioritizing group harmony over justice — a common dynamic that keeps harmful people comfortable.

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Here’s what people had to say to OP:

The Reddit community was nearly unanimous: NTA — and many urged legal action against both Lily and the former employer.

Most readers called the betrayal unforgivable and pushed for consequences:

[Reddit User] − NTA and I strongly suggest that you seek legal counsel. You had material losses from the slander that she spread about you, and you could absolutely recover...

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emptynest_nana − You need to get whatever proof to HR of your old job, so you do not have a stain on your record. Even text her, ask her why,...

I-am-here-what-next − NTA. She's not your friend because friends don't do that crap. Walk away from her and straight to someone for legal council to get things set straight.

Many dismissed calls for forgiveness as enabling:

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[Reddit User] − NTA. Any so-called friend that agrees with her can join her in the dumpster where they belong. That wasn't an accident or a simple mistake. What's worse...

Several questioned the post’s authenticity but still sided with the OP on principle:

TwoBionicknees − Painfully fake. … But firing her at the end of an investigation that found nothing would make them lose an expensive lawsuit pretty much automatically. There is zero...

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Apprehensive-Care20z − NTA this is one of those posts that seems fake, like "A m__man murdered my children and my spouse with a machete,

am I the AH for not offering him a cup of tea after he finished the murders? " That b__ch is not your friend, and never was. She is evil,...

A few focused on the bigger picture:

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airiwolf − YTA for reposting a story that isn't yours.

Losing a job because of a malicious lie started by your supposed best friend is devastating — especially as a single parent. Lily didn’t just make a mistake; she actively harmed your livelihood, reputation, and stability, then laughed it off and blamed you for being upset. That is not what friendship looks like.

Ending the relationship isn’t overreacting — it’s protecting yourself from someone who has proven they will sacrifice your well-being for petty jealousy. The real question isn’t whether you should forgive her; it’s whether you should consider legal steps to clear your name and recover losses. Your peace and your children’s future are worth far more than a toxic 10-year history. Do you think she should explore suing for defamation, or is walking away and never looking back enough?

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