(Ex) Boyfriend sucks

He went behind my back and started talking to this girl I have hesitations about (she use to send him nudes) and so many other shit has happened in a month I just felt hurt and betrayed and i told him it’d take me time to forgive him. Do I deserve that time? I’m a crazy? I knew he wouldn’t wait for me...but I wanted to be wrong more than anything. I wanted to believe he’d listen and wait. But that’s it. I can’t anymore, and for once I actually feel over him. Done with it. (Btw he apologized but 3 days later he called it “me overreacting” and stupid...it just doesn’t feel like he means it.” I’m i overreacting???