Is she playing me?

I met a girl recently and things were great we are always on the phone together whenever we can get a chance. But then I found out she had a boyfriend but it didnt really bother me at first as we were more friends at that time but after a while I started liking her more than a friend but kept it to myself. Her relationship with her boyfriend is more of a honeymoon period as they havent been together that long but I dont know why she is with him as he upsets her all the time and just uses her as I’ve met him and he made her buy all his drinks cause that evening she was upset and goes I do wonder why I am with him when theres better guys out there for me. A week later I finally cracked and admitted to her how I felt towards her she replies back with I feel the same way to you but if I wasnt with my boyfriend then I would want to be with you as I know you will treat me proper and right and when that day comes it will be a happy day for both of us.

I have a friend telling me she is just playing me and another one telling me it sounds like she wants to dump him for you im personally confused something tells me she is playing me but she just doesnt seem the type but another part of me is telling me she is waiting for her boyfriend to upset her again so she can dump him for me as he is apprently on his final chance. Were ment to be spending next weekend together and shes spending the night round mine but I dont know if I want to go ahead and with this now and just cancel it all together now.

Should I wait and see what happens? or pull myself out befour I end up getting hurt?