Does this girl like me?

So here is the deal. I really like this girl in my school (we're both 15). I'm in one of her cles where I talk to her quite a lot and I speak to her a lot on facebook, just normal chatty stuff. She has some signs like smiling a lot when she talks to me, but she does that with most people. She plays with her hair etc and acts flirty to. But the thing is that she always hangs round this one guy at recess times and gives him big hugs at the end of lunchtimes and is touching him quite a lot. The guys my friend and I know they're not officially dating but its obvious hes into her. She doesn't act this way with any other guys but me and him, so do you think shes into me?