I've had crushes on guys I shouldn't have and the tell tale for all their girls was how easy I was around the guys and how UNEASY i suddenly became when they came in the room,it's called a guilty conscience. Maybe your guy isn't aware of it,she may not even aware of how she feels but you should talk to him and if that doesn't work,talk to her. Only way to keep a woman's claws out of a man is to have your claws to deep into him for her to move them out.
~Halley~