If a guy hasn't called in over a week, does that mean it's over?

I'm seeing this guy that I have known for several months. We are on spring break now but at school, we communicate about every other day via calls/texts and I go over to his place a lot. We act like a couple when we are together, and the day before break, he spent the night and we slept together (literally slept, no sex) I asked him what exactly we were and he said that he really likes me and wants to see where this goes. He asked me what I thought and I said I think we're dating and he said I think so too. We've been seeing each other for 2 weeks now so I don't know if its too early to get exclusive or what. We are back in our hometowns for break and we haven't talked since last thursday and its the longest we have gone without communicating. Well, actually a couple of days ago he commented on one of my pictures (not of me though) on facebook so I guess he was looking at my profile. I don't want to call him because I feel like I'm always contacting him and he doesn't do it as much. I thought maybe he is distracted being home and seeing everyone again but then I see that he goes on facebook a lot and I know he called his friend so its not like he can't pick up the phone. We will be back at school next week and I don't even know what to say to him. He can't even send a simple text saying hi or something? Is this his way of saying we are over?