Need To Vent!!

I broke up with my Ex after we made two years because he wasn't faithful and lies way to much . Through out are whole relationship he cheated on me 4 times and lied to me so much and I would always break up with him and than we would get back together but this time I want nothing to do with him because he got a girl pregnant and now there engaged and that didn't bother me because I was done with him and moving on with my life. I was freaking happy asf. But than out of the blue he comes to my house out of nowhere and asks if we could talk . So we talked outside for a few and he tells me that he thinks about me 24/7 and he misses me and everything he dose makes if think of me and he fucked up and he's not happy and he friend to kill himself. But as he was saying this I wanted to laugh so bad because he did this shit to himself cuz I ain't tell him to go and cheat on me. So I told him to just live his life because this is what he wanted. And I'm about to graduate and than leave for college and he said he wants me to be happy and that he's proud of me but I didn't care because he was a horrible boyfriend when he lie to me I would break up with him and he would tell me if I didn't get back together with him he would kill himself and he just went missing all day than pretend to be his sister and texted me tell me she couldn't find him and he left a note saying he's going to kill himself. I took that shit seriously and went looking for him and when I couldn't find him I cried like crazy and began to blame myself for it . Than I figured it out it was him and went off on him . He's a horrible ass person and knows how to play with people's hearts like it means nothing to him. After the day we talked he started Dm me on Instagram and he even changed him bio. Before he had her name and his kids names in his bio (he has 4 kids) than he changed it to just him and his kids. But than he changed it again to " happily engaged". But he looked me in my face that day and said he wasn't engaged and doesn't even love her at all but I was not going to buy any of it cuz I already knew how he is. I just want him out of my life . I want him to leave me alone and stop popping into my life to fuck up my happiness. Now I don't even want to get into a relationship. And that's not fair to the boy that likes me but I just can't anymore. Story of my life.