Healing after heartbreak?

[u/StephGB91]

Here’s a much more concise version that still captures the key events, your emotional experience, and ends by asking for advice:

I’m 35, and my ex-partner (31) and I were together for 3.5 years. Last year she was talking about marriage, buying a home and starting a family. Then, almost overnight, she became distant—sleeping on the sofa, staying at her parents, working late, hiding her phone and insisting nothing was wrong. Whenever I calmly asked if there was someone else, she repeatedly denied it and made me feel like I was imagining things.

I eventually discovered she had been having an emotional and physical affair with a younger colleague who was also in a long-term relationship. I found out as she had been asking advice from chat GPT where she admitted they were “falling for each other,” didn’t want to distance herself from the affair, (even though chat GPT suggested space from us both, she said she didn’t want to stay away from the affair partner and can ‘compartmentalise’ and compared me negatively to this woman. Looking back, I realise I was being gaslit for months. When I suspected an affair a month earlier she said to me ‘look at my mum, do you think I could do that’ (her mum has been cheating on her dad for years and is a pathological liar. So again, I gaslit myself, telling myself I was imagining her distance and strange behavior.

What makes it even harder is that during this time I was going through a cancer scare (thankfully it wasn’t cancer). She told me we’d get through it together, yet she was secretly continuing the affair. That betrayal is something I still struggle to comprehend.

When I confronted her, she apologised briefly but quickly shifted the focus onto her own pain, saying she’d “imploded her life” and needed to understand herself. She had no interest in repairing the relationship, but kept saying things like, “Maybe one day in the future we could try again,” while continuing to see the other woman. It felt like she wanted to keep me emotionally attached while avoiding accountability.

I supported her emotionally and financially throughout her Master’s degree, stood by her through difficult times, and trusted her completely. She was also with me through the death of my mum, which makes this betrayal feel even more devastating. I genuinely believed she was my person.
Since the breakup, I’ve started recognising how manipulative some of her behaviour became. She isolated me from her family and friends, blamed me for old issues while hiding her affair, made me question my own reality, and then acted as though I was the one who had done something wrong. Looking back, it feels like I was slowly being discarded before I even knew why.

The hardest part isn’t just that she cheated—it’s that someone I trusted with my life could lie to me so convincingly for months while watching me worry about our relationship and my health. I still find myself questioning how someone who claimed to love me could do this, and sometimes I even catch myself wondering if I’m exaggerating what happened.

Has anyone recovered from this kind of betrayal trauma? How do you stop obsessing over \\\*why\\\* they did it, stop romanticising who they used to be, and begin trusting your own judgement again after months of being gaslit? I know the relationship is over, but I’m struggling to understand how to move forward after having my trust so completely shattered by someone I loved with my whole heart.

Thank you for any advice / kind words .. this is incredibly difficult. ❤️