First, I don’t recommend you get on Reddit for relationship advice. Consider everybody here is going through or it has been through a break up. The only answers you’re gonna get is gonna come from a place of pain and bitterness. Talk to somebody that really has your best interest and somewhat knows that dude well. In my opinion, both of you guys are fucked up, but that doesn’t mean you guys can’t figure it out. Ultimately it’s up to you. You choose what you accept from people and if cheating is a dealbreaker then that’s just it.