GIRLS: Advice please! Really confusing situation with this girl. I really need help!?

First off, you sound like a sweet, nice guy, so I don't think her decision has anything to do with your personality or a dislike about you. Second, from personal experience, I know that when a girl and a guy are friends and flirt and like each other, everything seems great, because it's like having a relationship, but still having the freedom to do whatever you want without committing. What I think is that she was caught off guard at the time you asked, and really hadn't thought about the possibility of you two being a couple for real. I wouldn't recommend asking her again at the end of the year becuase she could be annoyed. Give her time to think, and if she doesn't want to committ, move on. I know it may be hard, but if you can get this girl, you probably can get any other. Good luck :)