Relationships when separated from partner

hi, im in a bit of a situation, me and my wife are seperated, and im not sure it is going to work out, she cheated on me and i think still is. i have a friend that i really like, and lately we have been talking everyday on the phone, and even hung out at the fair the other day, she was there with some of her friends but ditched them so we could go hang out. but here is the complicated part, she is married, not officially, they got a divorce a few years ago but got back together but just haven't gotten remarried. they have a daughter that is a year and a half. up until recently when me and my wife split up, we have just talked occasionally, but now its quite a bit, i mean it seems like more than we should be considering. we have joked with each other and i even told her that i liked her when we first met but then i found out she was married. she also said that if she wasn't married then we wouold definately be together. im so confused i mean i want to say some thing to her about us really being together now, but im afraid that maybe she just really thinks of us as good friends, and that would mess it up. she is one of the few people i can really talk to since i split up with my wife. what should i do?

Question From: sidney - Oct 13th 2007