I think im being played

ok I just broke up with a girl that I love we were apart for over a month in this time she meant somebody new and had sex with him we hung out and had a good time we made out we talked about getting back together but now she doesnt know who she wants me...

or him and cant decide but she tells me that she still loves me....is she just leading me on to get back at me for dumping her in the first place

Of course she is leading you on.You don't need her anyways.She is using you. Forget her. Move on with your own life.That doesn't cut there if she is saying that she loves the other and can't decide. I bet she already made her own decisson there. I am sorry to say it.But this is the right thing to do. Try seeing someone new yourself. See want happens then. You are still risking yourself the hurt since she left you for another. Don't go after her. Find someone else.