It's hard for some people to get out of their little shells, I understand. But in college you have to break away. Break away from the shy, quiet girl you were in high school, middle school and elementary school.
Friends will get you far in this life. They help when you're feeling, homesick, lonely, depressed, angry, hungry, etc. It's important to make friends in school so that you can have an out when you start feeling any of these things. I know personally, being 18 hours from home, having people to talk to and keep your mind off of actually being homesick is fantastic. There are people around you, even now, that totally understand where you are coming from. And even if you think they don't, TRY. Help them understand, allow them to be a friend.
The only way to make friends is to get out and do something. There are opportunities on campus everyday for you to meet new people, to socialize. Take a chance! Who knows, maybe at one of the random meetings you attend you'll meet your BFFL (Best Friend For Life) or shoot, even your husband! Join clubs, play intramurals if you aren't an athlete.
Making friends also makes connections, which benefit you after college when you're looking for a job, or maybe even a place to stay. You need people to actually be at your wedding, and if you don't meet any, there won't be many...
Your roommate will either be one of your best friends, or maybe even your worst enemy. SO it is important that you meet other people so you can get away from them if need be.
GO NOW. GET INVOLVED.