limits on my kind

I am a seventeen year old freshmen in college. I finished my highschool classes a year ago almost to this day but didn't officially graduate until a few months later because of paperwork. I graduated a year and a half early. I currently live with a family that is not my own. I hold a decent job and do well at it. I also attend school. I feel that I lead a pretty responsible life but i am limited to what I am able to do. I cannot even get myself a public library card. I am nearly 18 but i cannot borrow books from the library. It is soo frustrating.