Me [24F] and my bf [23M] went back together but how can I forgive him?

Hi! TLDR so me [24F] and my boyfriend [23M] first met in 2021. He was fresh out of a relationship of 3 years so he cheated on me with his ex and we broke up.

A few months later he seemed to regret it so we gave it another try. everything went good and then he left me because he had a lot of mental health issues (he has retroactive jealousy, ocd and adhd). I got depressed but ended back with him as soon as he came back. Then a few months later, the same. He started hooking up with Girls that worked with me (he always said he felt disgusted at me because I used to have sex with men that were not in a relationship with me), some of them were even my friends, one of them became his "gf" until I started to talk to him again.

This last time we went back together thingd were different. No fights, no struggles, almost perfect. Everything seems perfect. But I feel like I'm driving myself crazy, I honestly want all of those girls he was with to be d**d. I dont wanna have sex with him anymore cause the only thing I can think of is how he used to do that with other woman while I was depressed ruining my youth because he left.

I feel confused. I love him more than anything and he is finally the person I always wanted him to be but I can't stand the pain of the betrayal. I can't forgive him, but I really want to. What should I do? I love him but should we keep working on building trust or just break up for good.