My ex is still in my life

I will admit I'm clinging but when he dumped me just before Christmas I wasn't as hurt as I thought I would be. He dumped me then didn't talk to me for about 9 weeks. Then he messaged me then disappeared again.

Well two days ago he asked if I wanted to go on vacation with him (when we were dating we were planning on going away but in my head it wasn't going to happen since he dumped me)

I said no and he was all mad saying how I'm a bitch. He said he still loves me but can't commit to me. He implies that he wants to have sex with me and leave it at that. I told him that I'm not the kind of person to fool around. I like the idea of being in a relationship with someone I feel like I could be with forever. I don't wanna have sex with just anyone. And he got mad at me for that sayin I was unfair because I don't want to sleep with him. He then had the nerve to accuse me of cheating when I never did. He freaks out when people comment on my instagram. I don't know how to get rid of him. I care about him as a person but not as anything more. Help!