#2 You bump into her often. And somehow, she doesn’t seem surprised to see you.
If you don’t know this girl or haven’t been introduced to her, and you still see her out of the blue in places where you like hanging out, she may want to catch your eye.
#3 Her friends seem excited. She seems nervous. One of the easiest ways to find out if a girl likes you is by watching her behavior when she’s with her friends. Do you see her friends nudging her while she blushes and discreetly looks at you now and then? Well, if her friends stare hard at you and laugh, and if she coyly catches your eye, there’s definitely a crush in the air.