Need Healing

My wife of seven years recently divorced me out of the blue.  Looking back, I can see where she started withdrawing from me several months ago and started losing a lot of weight.  After the divorce, she said that she wanted to date me and hopefully with a fresh start we could renew our relationship and hopefully get married again one day.  I agreed to date her, but after two weeks of that, I realized that other than cooking me a couple of good meals and going out a couple of times, I was doing all of the persuing.  I was rubbing her back, running my fingers up and down her arm, reaching to hold her hand, telling her that I loved her, but wasn't getting much response back from her.  This last Sunday, she called me and said that she just wants to end it for good.  My question is, why she would even bother trying to date anyway.  Was this because she felt guilty?  I'm on an emotional rollercoaster and nothing makes sense right now.  I always thought we had an unbreakable bond.