There is this guy and.....?

He and I dated for a year and a half and then I dumped cuz it wasn't workin out since I moved to a new town. And after that I really regreted doin that. He started goin out wit my best friend Beth and it made me kinda mad @ her. He dumped her and then asked me out and of course I said yes. Then a day lata he dumped me and went out wit Beth again. Then just yesterday he told me he like me when I was over @ his house and after I left he asked me out over the computer. I said yes again. And now this morning he dumped me again and hes goin out wit Beth...again. I try 2 get over him but, it's so hard! I go back over there 2 see his sis on Sat. what if he starts likin me agian and asks me out. I'm afraid to get hurt if I say yes. And then I feel like I'm lettin go of a good relationship if I say no. It was soooo much easier when we were younger...Help Me!!! He soooo cute! and I still really love him!!! :(