I was a very shy, very introverted, very much a "mama's boy" type when I went to college back in August of '96.
I was scared of being far from home, I didn't know what to expect, I felt much like you were describing. I also was very close to my mother, and stayed in constant contact with her.
You say you'll have trouble making friends? You're a gamer, find a gaming club on campus (most colleges have one) and go to some meetings, you're likely to find people there you can have common interests with, and maybe get into a new game where you can meet some new people. Find the local FLGS and ask around there too. Try clubs related to your other hobbies and interests too. If you don't have any, look around and see if there are any clubs for things you might want to try or find out more about.
Go beyond campus. Try the off-campus eateries that are popular, don't just stick with college food. Explore a little. If you're afraid of getting lost, see if there is somebody who knows their way around who wants to show you around.
Transitioning to college life is going to be a big shock. You'll be going through a lot, learning a lot, doing a lot of new things, you'll probably get scared and want to go home, but tough it out, and realize that there are many people around you going through the same thing, and millions before you have gone through it too.