Too complicated life?

I hd a bf for 4 yrs, nw he's my ex. He didn't exactly treat me well during our r'ship, he used to call me names & nvr trusted me, but i still tried working it out for the past 9 mths. He's very egoistic, so he didn't try changing even a little for me. He felt he didn't have to especially since he ws giving me a chance to prove myself. Unlike me, i did but he nvr noticed it. I feel i ws doing tht bcos i cldn't find another guy tht gave me as much attention as he did. I knw i deserve better but i can't let go 100% especially whn i'm lonely. Now i hv decided i shld totally let go off it but it's easier said than done. I wanna do other things to get my mind off him & the r'ship we had, we went through a lot together & i hv learnt a lot frm him. I'm also not sure if i'm ready for another relationship, my friend is interested in me at the moment but i dunno if i shld gv it a try. Wht shld i do?