Search Results: how to get over a cheating boyfriend

So my boyfriend has been my best friend for 5 years. In high school we dated for about 2 years. Then we broke up for 2 years. Now we've been dating for almost a year again. Best friends through it all, and friends with benefits for a while.

But I just found out I'm high school he cheated on me for a few months before breaking up with me. And he then basically dated the girl for that summer when we were broken up. They were just talking, hanging out, and kissing on the cheek. This girl became my friend once we broke up and was like the main one I leaned on and who supported me through the break up, me never knowing. I suspected he was with another girl but he would never tell me who. After all this time I just found out this month, and we talked through it and everything. I can forgive them, but I don't know if I can get over it and forget it. It sucks bc this relationship we've had now has been amazing, much better than when we were young and dumb, we've been really happy and healthy. I don't want to give that up for something that happened a long time ago, but I can't trust him now (i already have trust issues from childhood trauma!) And i don't want to be that toxic girlfriend who always goes through his phone, i hate that. But that's how I found out, because I suspected it still and it still hurt not knowing and he let me go through his phone so I found out. But since he lied to me for so long it just makes me sick to think it barely affects him now and he never would've told me. Also back then, they broke it off bc he never stopped loving me and realized he never liked her like that he'd just think of me, and he broke his heart talking to other guys. So I don't know. What would you do in my situation?

I have already met my soulmate who i can never be together with and we aren't in contact anymore. He helped me and i helped him and our roles in each other's lives are over. So i don't have to worry about "the one"
The biggest deal breaker in a relationship for me is cheating and i have always advised a break up if your SO cheats. Cheating is the same reason why i am scared to be in a relationship too. It seems that many people here and irl supports cheating too. I had a guy tell me he will pour sulphuric acid on to my face because i asked a girl to break up with her cheating boyfriend. I know a female user here who everyone compliments on how she's such a submissive good girlfriend while she's flirting and sexting her guy friend. Even some of my friends in committed relations talk about new crushes and flirting with hot losers.(They say it's for fun)
Whenever i express my hatred towards cheating, people ask "Did you get cheated on or something?". Obviously i did not. But i feel like what they're saying is i don't have the right to be upset about cheating.
Anyway i got a player guy who have always wanted to "date" me since i am not easy and i am 99.9% sure he will cheat. So if i date him and when he cheats, i may finally be able to get rid of my fear. Once i become immune, i believe that i won't be always thinking if my future SO (someone i love) is cheating and even if he is, I would be used to it.
You would feel like i am being a hypocrite rn so i will stop expressing my anger towards cheating and such questions from this moment onwards. And yes i am alright being a miserable girl who would probably be pitied on (Ik i need help🤷‍♀️).