How to get over a toxic relationship

Hi everyone, I need some advise.

I really misses him a lot. I’ve been thinking about our good memories a lot. But also I decided to stop because it’s draining my mental health. For my our good, I’ve stopped the relationship but I can’t get over him.

He’s not a bad guy, he treats me well. But he keeps on bringing up my past tackle me by saying that I’ve made wrong decisions in the past and he’s afraid I’m going to repeat my actions. (My past doesn’t relate to him).

He told me his feelings mattered more than mine. When I get emotionally sad or angry because he brings up his ex and said that he would go back to his ex, he would shift the topic to my past and said bad things about me. I asked him and he said his feelings mattered more than mine that’s when I decided to stop.

There’s one time we went on a trip to a really high class bar, my lower back suddenly ache and hurts really bad so I couldn’t sit still or stand or walk properly so I started giving my back a pat to try and relived the pain. He was mad at me and said can you not embarrass me.

There’s more of these toxic stories of mine but I think I’m not gonna blurp out too long.

Just want some advise, am I a bad person ? Or am I not strong enough to take it ? Or is it really no good for me ?

I really miss him a lot despite that he treated me this way, I could just ignore how badly it hurt just wanting him back but I’m trying to resist myself.