Carly,
I feel as though I can identify with your situation. I'm not saying it's all about one thing, but I do know that sometimes when we have to worry in such an obsessive way about money, we feel greatly diminished in our capacity to do things such as make changes in our lives, be social, date, or even just care for ourselves. With many college students, they are not thinking about money (their parents are) and they can be free of many of the worries and troubles that face those students who have to manage their own financial affairs. Then, those of us in the minority group of college students who are soley responsible for their own finances see the other, more typical, college students and could experience feelings of being left out, depressed, worthless, or "in a rut;" I know I have experienced all of these feelings at one point or another.
Please do yourself a favor and fill out (if you haven't already) a Federal Application For Student Aid, fafsa for short, at the following url:
www.fafsa.ed.gov
This is a free government need-based aid program for college undergraduates. It takes into account your income, your parents' income, the cost of the institution you wish to attend, and offers a financial aid package which may include scholarships, grants, work-study, or student loans that will meet the cost of college. I attended an in-state university but lived on campus (so I didn't need a car) and was able to do that soley as a result of the financial aid package I recieved from the fafsa.
I graduated, worked for two years, and decided to return to school as a graduate student, which is where I'm at now. I wish I had some advice for you regarding the social aspects of your dilemma; I think we all have to go about that our own way, though. One of my majors in college was music; I was in large and small jazz groups, concert bands, orchestras, and at times I still felt so alone! I am gradually becoming more and more social as I learn to value myself for simply being a good person. When you're ready to be more social, it will help if the environment you're in is one that might give you a chance to find like-minded individuals (people with career goals similar to yours) so the grocerie store may not be the best place for that. Some other places to look might be on-campus jobs if you go that direction, or possibly even waiting tables; any place with young people near your age that are employed specifically to finance their education (there are places like this if you look for them...I can think of this Kinko's store near my parents' house).
I hope I haven't been condescending or pretentions-sounding. You seem like a smart girl who deserves a better life. Good luck.
-m