My boyfriend calls me a slut a lot

Pls no bashing. I’m just venting. My boyfriend & I broke up and I had sex with someone else during that time. We were broken up for four months (he also had sex with someone else) and decided to try and work on things. Every time he gets mad he says so many hurtful things like slut shaming me & calling me a whore/disgusting etc. today it was over something so stupid (what day we would hang out)

He always says he needs space from me but if I ask for it, it’s because I’m a slut and fucking someone :(

I told him I couldn’t handle it anymore and he said I was running from my responsibilities if I left him

Edit: he said it was because I had sex first and with a person in the mlb (major league baseball) and it made him feel bad so I’m a slut for doing it? Idk