Advice?

I don’t want to get back with my ex but I’m always thinking about him. We broke up 2 years ago and he still always crosses my mind. Him and i were in a relationship for 4 years and since we’ve broken up I’m in another relationship. I have my ex’s number blocked and him blocked on all social media but how can I block him out of my head.

We broke up because he was physically abusive and always cheating...