She definately likes you dude. Either that or she is just a flirty girl, which either way could be good for you. I was in a similar situation with my best friend that was a girl, and we ended up hooking up, even though she has a boyfriend. It's all up to you, though.. if you see her as more than a friend then go for it, but if you only want her as a friend, leave it how it is, because things can get awkward if it doesnt go right

Yes, she does! She's probably secretly in love with you but is afraid to come out and tell you! Wake up boy! If you feel like you might feel the same way, then SAY something to her! Why wait?