She likes you. Period. Someone who thinks you are eye candy will flaunt you or flaunt your interest. If I realize a guy is considered good looking but he does nothing for me, I don't pay attention to him. If I like a guy, I look at him a lot and it is more difficult to talk to him then to talk to someone else the more aware I am that I like him. I am not considered shy at all but I can clam up when I like a guy or say dumb things. Yo smaile a lot because seeing them makes you happy.
If it seems impossible getting to know a girl and you like her, I say just ask her out. There it's out. If she still doesn't say anything and just smiles, just make the plans:p.