What does it mean when girl smiles at you or blushes?
She's interested. Ask her out!!
It means you turn them on, just kidding, it means that you're the odd one out, the one that they're paying the most attention to.
It means she probably likes you. Or she thinks your kinda, sorta, really good-looking. :)
It means you make her all fluttery inside. :)
she thinks you're good looking, or she likes you :)