He won’t leave me alone

I used to be friends with a guy, and I cut him off because he became so needy. Every time I wouldn’t reply, he would think I’m mad at him and then ask me why I didn’t reply. He knows that I don’t like him more than a friend, but it became so mentally draining to have to talk to him every single day. I cut him off because it started to affect my mental health, and now he keeps finding me on social media and keeps bothering me. I’m so sick of him. In my previous relationship (he was friends with the guy I was seeing), he would try to sabotage it and constantly called my phone when he knew I was with the guy I was seeing. yesterday he found one of my other social media accounts and tried to message me. I’m so over him. I blocked him on everything, so he can’t find my accounts.