I just left a relationship earlier at the beginning of the year that was so toxic, and I didn't even know how toxic and dangerous it was until I left. At first, I cried for a couple of weeks because I was sad, but once I healed and realized that he was slowly ruining my life and self-esteem, I stopped missing him. Hopefully you will come to a similar realization.
What helped me in my healing was treating myself to things I didn't normally treat myself to, especially things I didn't do in the relationship. Taking warm baths, visiting new and exciting places, wearing makeup (I always felt guilty about wearing makeup and heels because he hated them). My ex was extremely possessive and strongly against the idea of me stripping to make extra cash (that is usually where the unsupportiveness comes from-is possessiveness and them resisting female sexuality that they cannot control) and now I am opening myself up to stripping as a job option, once my schedule settles down. The things men make us fear in ourselves are the very things that give us power. I am recreating myself as a new person and engaging in a new world.
My ex is harassing and cyber-bullying/stalking me. He is telling all of my internet supporters that I only want to strip because I was raped multiple times and that I used to be promiscuous. His harassment has increased, the more open I am about my sexuality.
I am in the middle of taking legal action against him to keep myself safe. He was abusive in our relationship. I struggle with lots of feelings and questions about myself-including being angry at myself for entering another relationship that is not good for me.
I am trying very hard to not hate and resent him for all he is putting me through and how sexist and abusive he is, but I'm realizing maybe I just need to allow myself to hate him, acknowledge those feelings, and release them.
Best Wishes to you.