I found out my ex was cheating on me

So I found out that my ex was cheating on me but we had already been broken up for a week for other reasons. I was thinking of fixing things with him but then I found out he was on several dating sites and was open that he was in a relationship AND living with me but wanted a “friends with benefits” type deal. My heart is heavy about it but I’m trying to power through it. Me and him will no longer be fixing anything because I cannot forgive him for cheating on me and treating me shitty. He’d always bring up things I didn’t wanna talk about and making it sound like I was lying. Then when we broke up he has the audacity to say I was controlling who he could talk to when I never did I never cared about who his friends were I just wanted loyalty. I worked my ass off on a broken foot so we could have a place to sleep and food to eat and he was cheating on me looking for other girls through out all that. I’m really fucked up over it. It’s hard because we were together for 3 years and lived together for 2.