This girl's probably into you based off that I reckon. Sounds like the kind of tentative thing where if you aren't a thirsty retard about it you could hook up with her but if you play it weird it won't be anything.

Thing that strikes me though is, you're asking this for a reason. It's because you want to bang this girl and you kind of know you could potentially already. That's fine, but not if you've got a girlfriend. I've fell into this kind of trap before myself, this cognitive dissonant shit where you want to have a girlfriend and play all this romance maybe we can bang shit on the side. It's a bad idea. Stop that shit or break up with your girlfriend and go be single.