I broke off a relationship in April after two years of being with him. He had BPD and it was awful to deal with because he wouldn't get help or take meds. He was abusive physically, emotionally, and verbally. Two weeks before I broke up with him, we had a really bad fight and he wound up yanking me out of my car by my foot and pinning my arm behind my back. But for some reason it took me two weeks to even say I wanted to leave him. I'm still angry with him after 8 months but it has gradually subsided. I cut off all communication with him several months ago. I still have flashbacks and nightmares but like my anger, it has gradually gotten somewhat better.

I would cut off all communication with your ex if I were you. He doesn't sound like he really wants to change. People say they will but a lot of times they really don't. I'm glad I cut my ex out of my life. That relationship was very toxic. I really hope you find a way to release your anger and feel better.