Cita, I feel for you. I've been in 3 long distance relationships and IMO, you need to be able to talk to keep the connection going. First relationship, the guy called me all the time - I had no space. It was as if he didn't trust me. Second guy is the one I stuck w/ for 7 years and he seldom phoned or emailed me. It was completely opposite of the first guy. In fact, 2nd guy always reminded me it cost him money to call me. I repeatedly asked him to communicate with me, to little or no avail. When he did talk, it was either to lecture me or tell me the world was against him. I seldom saw him during the last 3 years of our relationship. I finally realized I couldn't live like that. I needed some meaningful communication and he wouldn't give an inch. I always felt like an inconvenience to him. This time, with my friend I'm seeing, we talk about once a week. He doesn't have email outside of work. I never feel like I'm bothering him if I call. He'll call me, too. He doesn't talk a lot, but when we do, I feel like I'm important to him.
Now, you say you've never had another b/f. Are you his first g/f? Maybe being apart has him looking for what he thinks he missed, that he doesn't know if he's ready for commitment. I'm throwing that out there, of course, not knowing much about the whole picture.
Relationships are tough, esp. long distance. And if you keep running into this stuff with your b/f now, how will it be in 5 years? The make-up sex can only repair so much.