How do I heal after a toxic 6-year breakup at 23 and let go?

I just got out of a six year relationship 17 to 23. I feel really lost. I really loved him a lot, but he actually treated me like shit. He cheated on me twice he completely disrespected me. He would talk down to me. Call me names he would never be the bigger person, and he was always angry. I just feel like he will never understand the love that I have for him and that’s what’s hard and he would also create a version of me in his head that wasn’t real saying that I was always going out and doing stuff behind his back which by the way I wasn’t I’m like always home and he knows that I don’t know if it was projection or Genuinely he was insecure. But I feel lost the last thing he said was to leave him alone and not to contact him ever again I really don’t know what to do. I feel like I’ll never talk to them ever again. He said that he never wants to see me and that it’s over and it’s weird because deep down I don’t even wanna be with him, but it’s like my initial reaction is to fix things, but I acted crazy last time we spoke and now I haven’t spoken to him for 24 it’s been about two months of us being broken up, but we still spoke here and there but now I think it’s really over.
How do I heal after a toxic 6-year breakup at 23 and let go?
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