Am I needy?

My boyfriend and I are freshman in college and we met about a month ago. Both of us are living in the dorms and basically had to start fresh as far as friends as we knew nobody. But since then we have both made friends and have basically combined the people we have met into one big giant group. This is fantastic, but the problem is, it seems that he wants to spend a lot more time in a big group than just me alone. I wish we had more alone time but am afraid to suggest it most of the time. I really don't mind hanging in a big group, but sometimes I want it to be just us. Is it unfair that I think this, or do I have reasonable desires? And if I'm NOT just clingy, how do I tell him that I want to spend more time alone?