(((hugs))), just because it seems to be the same'ol "awkward teenage thread" doesn't mean that your feelings aren't any less real or important. You fears are certainly valid.
Good news? Most College's/Universities have resources already put in place for support. I'm sure that wherever it is that you're going will have a counselling services (or an equivalent), as well as some sort of drop-in peer support centre. There are often groups that are organized for students who need X, or who are looking for support with X, etc. I'd suggest researching what your college has to offer, and seriously, SERIOUSLY, look in to it. I say seriously not because I think you *seriously* need help or anything.. but just that most people aren't even aware of the support that is available to them, and most people would benefit from the provided services.
I just finished my undergrad degree, and I can tell you that I am so so SO thankful that I was able to get the support where I did.
In terms of finding a place that is just yours... while it can certainly be tricky at times to get away from all the noise and activity in dorm rooms, there is likely a place or two on campus that you can go to in order to escape some of that for a while. When I lived in rez there was a piano room that I use to go to for some down time. Granted, I played piano so I did that, there were often sometime students who would go down there for some peace and quiet. Another couple of spots that I liked were little places in gardens around campus.. quiet fields after supper, little valley's or parks just off campus, and when in seriously need of quiet.. cubicles at the library! No jokes, you can just put in some music and fine some space either in-between book shelves (my preferred quiet space and study area), or if they're unavailable, cubicles did the trick just fine.
Anyhow, I hope some of that helps. PC was an excellent resource for me during my first year, and so if nothing else, you have this awesome online community for backup

Jacq