Guy Problems?

Okay I'm going out with this guy whom I do like but dom't know if I should stay with him.He keeps going up to Gainesville for about two weeks at a time and never calls, he's a flirt so I never know what I'm gonna find out when he comes back, and every time I think I'm gonna leave him he looks at me with thoseeyes that you can't resist. I had a horrible dream the other night about him cheating on me, and I've seen him flirt with other girls. I just can't figure out what to do because we both really like each other. Help Me Please!