It’s the second week of college, so the academic work should be kicking in. You’re going to be spending a great deal of time studying (in fact, you should be starting to do that now). I think this will help decrease your feeling that everyone else is doing social things while you’re not. A lot of the time, none of you will be doing social things. You’ll be working on academic assignments. If that’s what you’re doing (and you should be, a lot of the time), you will have a lot of company.
For some people, the hardest part of college is the very beginning – the orientation/registration period when there’s no academic work to do. You can feel like you should be doing something social at all times. But that’s not real college. That’s camp. Real college has a different feeling, where you may find yourself struggling to find time for social activities around your more important obligations.