I Don't Know What I Should Do?

One day , A guy added me on facebook , i thought he was really good looking so i accepted his request . then we starting chatting and we used to chat for hours ! we started liking each other . Then one day we had a fight ! and it was really bad i kept sending him messages insulting because i was really angry ! but then i started regreting it .. and i decided to go and apologize .. i thought he wouldn't accept my apology but he did ! and that day he told me that he like me and he wants to be my boyfriend and he said really sweet words :) ofcourse i like him too ! but i was afraid to say it ! because i had that feeling that he is lying and i just told him we need to be closer ... day after day he stopped talking to me and i was really sad about it and one day he sent me a message saying why don't you talk to me are you mad at me or something and i said no then he asked if there's something making me sad . that time i had alot of problems but the big problem was him ! so i just said i was ok then he started acting weird and kept talking about what happened before and those messages i sent insulting him ... and we had another fight :/ i was crying and my sister made her boyfriend call him and he insulted him too :/ then 2 days after that he sent me a message saying ''get a life !'' and he blocked me on facebook . and since that time i'm depressed ! it's killing me and i want him ! but everyone says i should just move on but i can't ! it has been 3 months and i really miss him ! i don't know if i should go say sorry ( for the second time ! ) maybe he doesn't want me anymore ... i really need help so if anyone could help me i'd be grateful