I am really shy and this is normally what I do when I really like a guy. I avoid eye contact. Sometimes I will even take it as far as keeping my head down when I know that he is looking at me or he is about to walk past. I wish I wasn’t so shy but it is just how I am. If you have noticed a girl avoiding eye contact with you and it always feels as though she is looking at you while you aren’t looking, she likes you but she is just really shy.