I need advice!

A person that had caused my depression last year and stopped talking to me that had also hurt my friends by asking them out when he knew they had a bf and punch one of my friends in the back of the head almost to where my friend was unconscious. He created a fake account just so he could talk to me and try to be friends with me again. He has put all of his personality into it and trick me. He was the reason I wanted to commit suicide and also wanted to self harm. I don’t anymore. I’m much better now. What should I do? Should I try to befriend him again or should I tell him to leave me alone and never talk to me unless I’m partnered with him for something at school so I don’t get hurt again?