It’s wild how life can be humming along smoothly, when suddenly, the past rises from the dead like it just missed the drama. You think you’ve healed, moved on, and even laugh about the old heartbreaks, until someone from the friend group casually drops a plot twist so sharp, it could slice through your new IKEA furniture .

That’s exactly what happened to today’s Original Poster (OP), who thought her ex-boyfriend’s vanishing act years ago was just “one of those things.” No closure, no big deal, until a mutual friend revealed the real reason why he left.

More info: Reddit

Some betrayals arrive quietly years later, disguised as casual conversations and half-smiles from people you once trusted

Young woman revisits past breakup, confronting a friend who reveals she was the other woman all along near waterfront.

Young woman revisits past breakup, confronting a friend who reveals she was the other woman all along near waterfront. - 1

The author was suddenly broken up with by a longtime childhood friend, without explanation

Woman revisiting past breakup after learning from friend she was the other woman in the relationship.

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Text excerpt discussing a woman reflecting on her past breakup after discovering she was the other woman all along.

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Text excerpt about a woman revisiting a past breakup after her friend reveals she was the other woman.

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Text on a white background reading I was very surprised and upset about the break up and never got closure as to why he ended things.

Text on a white background reading I was very surprised and upset about the break up and never got closure as to why he ended things. - 5

Two women having a serious conversation outdoors, revisiting past breakup and revealing one was the other woman.

Two women having a serious conversation outdoors, revisiting past breakup and revealing one was the other woman. - 6

They continued to share a friend group, but she kept her distance from him after the breakup

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Text excerpt discussing a woman revisiting a past breakup after learning her friend was the other woman.

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Close-up of a woman and man intimately embracing, reflecting a past breakup and complex romantic emotions.

Close-up of a woman and man intimately embracing, reflecting a past breakup and complex romantic emotions. - 10

Years later, the ex’s new girlfriend, in the same friend group, revealed she had been sleeping with him during their relationship

Woman looking reflective and upset after discovering she was the other woman in a past breakup revealed by a friend

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Text excerpt showing a woman revisiting a past breakup after a friend revealed she was the other woman all along.

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Text excerpt about woman revisiting past breakup, expressing reluctance to discuss past relationships.

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Alt text: Woman revisiting past breakup after learning from friend she was the other woman, reflecting on complex emotions and trust.

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Text excerpt from a woman revisiting a past breakup after learning her friend was the other woman, reflecting on trust and surprise.

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The OP had dated a longtime childhood friend , and everything seemed fine until it wasn’t. Without warning, he ended things, offering little to no explanation, and she was left confused, hurt, and with no closure. Still, life moved on. She found happiness with a new partner and a healthy relationship that has stood strong for nearly four years.

Despite the breakup, the shared friend group with her ex remained. Although she no longer interacted with her ex, they continued to attend the same events. Things stayed civil, if slightly awkward. But then, her ex started dating a friend from the same circle. While catching up with the new girlfriend , the conversation started on a positive note.

The OP was genuinely happy for her, noting how she’d previously dated toxic men. However, this was where the friend confessed that she had been sleeping with the OP’s ex for years, and that they’d slept together during the previous relationship. She also revealed that the ex only ended the relationship because he felt guilty for cheating .

The friend thought she knew all along, but no, the OP actually felt blindsided. It has been nearly five years since the breakup, and she is happy in her current life, but the sudden revelation reopened old wounds. Understandably, she hasn’t told her current partner about the encounter. She fears it might come across as if she’s still hung up on her past.

Even when a betrayal happened years ago, discovering it later can feel like a fresh wound. Bored Panda reached out to clinical psychologist Christabell Madondo , who explained that “our brains don’t care when the pain happened, they care that it happened.”

She added that learning new, painful truths can send our minds into emotional time travel, rewriting the story we thought we knew. “It’s not just the betrayal that hurts, but the realization or version that what we believed was safe actually wasn’t.” According to her, this “retroactive heartbreak” shakes trust, memory, and sometimes even identity.

Woman sitting on couch upset and revisiting past breakup after learning friend was the other woman all along

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When it comes to sharing such painful revelations with a current partner , Madondo encouraged openness, but with intention. “If this old betrayal is emotionally affecting you now, it’s definitely worth talking about,” she says.

However, she cautioned against offloading unresolved pain just for the sake of it. “The key question to ask yourself is if it’s about connection or just catharsis.” If it risks causing unnecessary tension, she recommends processing it first with a therapist.

So, how can someone heal without letting the past sabotage present relationships? Madondo suggested starting with self-reflection and emotional honesty. “I always recommend allowing yourself to feel the pain, but not letting it take the wheel. I know a lot of people would rather avoid the pain, but sometimes, it’s necessary.”

“Not to be biased, but therapy usually offers a safe space to separate old hurt from current reality,” she joked, but added seriously that “journaling also helps as it can guide in identifying what was truly lost, be it trust or self-worth.” Ultimately, Madondo emphasized investing in the current relationships with openness and trust and not allowing the pain of the past to affect the present.

Netizens urged the OP to reevaluate her entire social circle, emphasizing that the so-called “friend” crossed a line that can’t be walked back, and that silence from her ex only deepened the original hurt. They also encouraged her to talk to her current partner, making it clear that processing betrayal isn’t the same as holding on to an ex.

What would you do if you were in the OP’s shoes? Would you tell your partner or leave it in the past? We would love to know your thoughts!

In an update, the author stated that she had shared it with her current partner, who was supportive, but netizens urged her to reevaluate the whole friend group

Alt text: Woman revisiting past breakup after discovering friend was the other woman, reflecting on trust and betrayal issues.

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Woman looking reflective and emotional while sitting alone, revisiting past breakup after friend reveals secret betrayal.

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Woman reflecting on past breakup after friend reveals she was the other woman, feeling betrayed and hurt by cheating.

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Woman emotionally revisiting past breakup after friend reveals she was the other woman in the relationship betrayal.

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Woman revisits past breakup after friend reveals she was the other woman, causing emotional reflection and conflict.

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Woman reflecting on past breakup after friend reveals she was the other woman, experiencing emotional conflict and betrayal.

Woman reflecting on past breakup after friend reveals she was the other woman, experiencing emotional conflict and betrayal. - 27

Text post from user ReflectionLess5230 offering advice about addressing trust issues from past relationships.

Text post from user ReflectionLess5230 offering advice about addressing trust issues from past relationships. - 28

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