This Guy’s Best Friend Secretly Ruined His Relationships, But Her Latest Target Is His Fiancée

One ambitious professional thought his life was perfect, until a shocking revelation exposed a monster in his inner circle. He was thriving in a successful season, racking up cloud tech certifications and planning a wedding with his international fiancée. Behind the scenes, however, a supposed best friend was running a multi-year sabotage campaign to keep him isolated and miserable.

From hiding phone numbers of potential dates to spreading vicious rumors about his mental health, the betrayal cut deep. Curious how this toxic friendship unfolded? The full story is right below.

This Guy's Best Friend Secretly Ruined His Relationships, But Her Latest Target Is His Fiancée

My "best friend" has been sabotaging my life for years. I just found out she's spreading lies about my health and ruin future marriage

Every profound betrayal starts close to home, and this one struck at the very heart of his chosen family.

I am a 33-year-old male experiencing a betrayal I didn't see coming. I have a 'best friend' who is practically family—my mom considers her a daughter. Recently, through a trusted...

Right now, I'm in an incredibly successful season: AWS and Google Cloud certified, being considered for a promotion, and saving everything for my wedding. My fiancée is moving from a...

I have now found out she has been spreading rumors that I'm autistic. For the record, I am not autistic. She is just using it as an insult to ridicule...

She is calling my certifications a 'waste of money' and saying that I'm 'destroying my fiancée's life. '

The reality of the sabotage finally clicked into place, revealing a chilling pattern of intentional isolation.

The most hurtful revelation: I learned she's ruined my past relationships as well. She badmouthed a girl I was interested in in the past to make sure nothing ever happened...

That girl is now marrying someone else. Backstabbing behind my back, she says, 'No girl will ever love him. ' Work backstory: Her husband introduced me to my current job....

Yet, she wields the referral like a leash to keep me in check. Now that I'm her top performer in the department and on track for a promotion, her jealousy...

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My fiancée's family knows exactly what this woman is doing, and luckily, they are fully on my side. My current situation: She's been calling me to 'apologize' or talk about...

I am staying in a 'study lockdown' to protect my mental health. My dilemma: I do not want to out the friend who gave me this info or get them...

I'm devastated that while I'm bettering my life, the person I thought was my sister has been actively trying to keep me alone and unsuccessful for years.

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Updates

TL;DR: My 'best friend' lied about me having autism, mocked my depression, and sabotaged my past relationships. Now she's trying to ruin my marriage to the cousin of the person...

The devastating actions uncovered here aren’t just petty jealousy; they are textbook examples of a psychological pattern known as relational aggression. While often associated with middle school cliques, this behavior is highly prevalent in adult friendships. Relational aggression involves using social relationships as a weapon to deliberately damage someone’s reputation, social standing, or sense of belonging.

Instead of direct confrontation, the aggressor uses covert tactics like spreading gossip, isolating the target from romantic partners, or undermining professional success. Here, the friend weaponized a job referral and mental health to maintain control. This toxic behavior stems from insecurity and a fear of losing social dominance.

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For anyone facing this dynamic, attempting a quiet exit might trigger an extinction burst where the aggressor escalates their behavior. Instead of just avoiding her, the author should quietly strengthen his healthy alliances—like he has with his fiancée’s family. Prepare a neutral, boring script like ‘I am just swamped with wedding planning’ to use consistently if cornered.

Community Opinions

The Reddit community was entirely in the author’s corner, with most users urging him to protect himself by leaning into the ‘busy’ excuse while warning his family.

u/Impossible-Snow5202 "Sorry, I'm really busy with work this week. I'll catch up with you in a few days."

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u/floss147 Conveniently be too busy until you get your promotion, then use that experience and skill to move jobs. Continue to ice her out. It’ll get better if you’re far...

u/Automatic_Serve7901 I woukd just tell her your autism is flaring up, so you need to stay home to rest ;)

u/iknowsomethings2 ‘Sorry, wedding planning is ramping up, and work is really busy. I’ll reach out when things cool down’ And obviously never reach out. Mute her, tell your family the...

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u/WanderVision She already knows something is up (she keeps calling to apologize or talk about something important). So a slow fade may not be a possibility for you. That doesn't...

u/bluefairytx You should at least tell your family what happened and how you feel. Let them.know.you no longer feel like you can trust her and don't want to be around...

u/Special_Lychee_6847 Let your family know, so they know you don't consider her a safe person. And so they'll know why she'll probably be dropped from the wedding guest list. And...

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u/Chocolatecandybar_ You should tell your family what you came to know. And then be very busy 

u/SiroccoDream I am so sorry that you have discovered that your “friend” is a snake. As close as you felt to her, this betrayal must be awful to deal with....

u/charlibeau This happened to me. I found out my supposed best friend would slag me off to mutuals and lie about me. I lost a lot of friends because of...

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u/Pristine-Payment Give all that information to your mom right now, and not because she's a gossip, but because she's already tried to poison your other relationships. Who knows what she's...

u/Past-Bluebird-4109 Are you in a one party consent state? If so then just don't necessarily confront her, just try to "fish" information out or set up something that she may...

u/Remote_Bumblebee2240 What does she want from you? Why doesn't she want you to mate?

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u/shit_ass_mcfucknuts Seems like she wanted to be the one to marry you and she lost it when you moved your future wife in. What she did was beyond jealous and...

u/mcmurrml You keep putting her off and stay away from her and share nothing with her about your life. You will eventually have to tell your family not to share...

A few commenters rightly pointed out that because their lives are so deeply intertwined, a quiet exit might be impossible without some collateral damage.

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The betrayal of a trusted friend is a difficult pill to swallow, especially when it involves years of hidden sabotage. While the author hopes to quietly distance himself, the tangled web of family drama and work connections makes the situation a delicate tightrope walk. Maintaining boundaries will require strict emotional discipline.

Do you think the ‘slow fade’ strategy will work against someone this manipulative, or is a direct confrontation inevitable? And how would you handle a friend who secretly tried to ruin your relationships? Drop your thoughts in the comments.

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