I feel like my wife wants out of our marriage?

I cheated on my wife 7 years ago as a resulted had a child with the other woman. 2years ago I asked her for a diviorce because things were not getting any better and I was tired of seeing my children suffer. In the middle of the divorce she fight for marriage to be saved and then say she didn't want it . Back and forth, back and forth. I sat her down 2 days before the divorce would have been finalized and explained to her that this is a tough thing to ask her to stay with me for but that she had to make the right choice for herself. I would understand and was prepared to let her go. We stopped the divorce started counseling and things seemed to be getting better. Recently I am noticing she gets easily pissed and in the drop of a hat is looking for the slightest excuse for us to go our separate ways, but won't come out and say. She is very cold and callus with me. I approach my realtionship with her with a servant heart. I have neglected alot of my own goals and aspirations to support her. She just treats me like a floor rug. I can never get straight answer from her. It's always an excuse. She finds everything possible to distract from the issues confronting us. She ignores me. However she says she wants our relationship to work. I am confused because at the drop of a hat if I ask her if she wants a divorce she tries to turn around on me. Repsonding with "Well if that's what you want." I love my wife and I have commited my whole being to trying to make things right. I just feel like she won't come out and definitively say she wants a divorce. She keep playing these games with me and I am very frustrated. What should I do?