Need some advice about a girl.?

Talk to her. I think she really does like you but because you are so shy she is getting mixed signals. I think she may see a little of the person you hide inside. You don't need to completely open up to her and expose yourself, but you do need to at least talk to her as you would talk to your friends. Open up a little and take a chance. If it backfires it is not the end of the world, you just take a deep breath and move on. Don't be afraid to take a chance. If you hold back because you are afraid of rejection then what you will miss out on is much worse than an occasional setback. I was like yourself once.