Ex-boyfriend vs. boyfriend?

Ok, Long story.

So I had this boyfriend and it was an abusive relastionship not physically but Verbal and emotion. We were together for a year spent alot of time together then i found out he cheated, gave him another chance then he broke it off. I wanted it to end but i loved him sadly ,even if he abused me. My mom knew about it and hated him because she followed are relastionship through, she wanted to help but I told her I could do it myself. We were constantly on and off. though that year. but soon we always fought he cheated then he broke it off. He always says i ****** his life up. Anyways, so i had my best friend for a year and we started going out like a week later its been at lease a week and 3 days together. I really like him he is everything i wanted but my ex...he is always on my mind Its like i cant move on and i dont want that getting in the way of my new relastionship because he is an amazing guy. Im not obsessed but i always get on his facebook and check his statuses to see if he is ok. But he put me through hell. I hate him. Then i love him but i wanna get rid of him so i can have a new healthy relastionship with my new Boyfriend. So what do i do to get rid of him out of my head and the memories.