Is she interested in me?

I think she is starting to become interested in you, and i think she wants to see if you two can be more than friends. Yes definately try to become her next boyfriend! But dont try to hook up with her now though for sure, you'll cause problems with the boyfriend. My general thought is that you guys are for sure interested in each other, and you two could be a couple in the future. I can see her drifting from her boyfriend down the road.