friend just being friendly or flirty?

OK I have known this girl since the beginning of the school year and shes really cool. We get along great, laugh all the time, etc. Well I know she has a boyfriend right now, but lately she has been really flirty. She would come up to me and put her arms around my shoulders and I would hook my arms around her waist out of instinct.

Well she did that today again, and was asking me a few questions, like

Her: Hey Bob, Where do you live?
Me: By the hospital
Her: Really? thats where I'm moving, maybe you can come over and we can play videogames, or swordfight with my plastic ninja swords.
(by the way I'm 17, shes like 16. She's a huge anime and videogame fan.)

Another thing she said today

Her: (To me and our friend E.) Have you guys seen the Matrix?
Me: Nope
Her: Hey we should all go together (she then looks at me and smiles)

She asked me all this stuff in the span of like 15 minutes and spent most of the class talking to me.

I'm not sure if she likes me or not, and what about her boyfriend, so what do you guys think I should do? Just be friendly as always and let things work out the way they do?

Well, why don't you tame that little boy-crazy girl and remind this young lady that she has a boyfriend. Does she? Maybe she wants to break up with him, or maybe she's a little cheater.

ur absolutely correct killerbabe!
Bob/ Banky, one question: how would you feel if you were the boyfriend?
As for that girl, she's really just playing around. Wether she likes you or not is not what's important. What matters is how YOU want things to be with a girl like that.

Hey, I made a post on this topic and now it's gone. Wtf?