I agree with Mike_J. That was exactly my experience in high school - total nerd, had only a few friends, didn't really fit in and avoided other people for the most part. But in college I opened up a bit, made friends with lots of people in my dorm, and had a boyfriend for the first time in my life. Sure, it wasn't all good times, but college was a chance to start over with new people and new experiences.

Plus, if you need to get away from people, try the library. That's where I went to hide when I needed quiet time.