Hang in there. I call this the transition phase and I am going through it as well. I miss her and everything we had together (at least in the beginning when there was true commitment on her part) but I know that the way forward without her is much better than the way forward with her which would be filled with wasted energy making sure she was being faithful and in love with me. It's a period of partial detachment but not full detachment.
What is working for me is when I start getting those feelings of regret and loss of our relationship I instead start focusing on the positives of not walking on eggshells anymore, the pros of doing what I want to do and when I want to do. Thinking about what I am doing to improve my life going forward, the plans I am making and how I am going to get there. Afterall I'm the only one I can control. It helps me to redirect the wasted worrying about what coulda, shoulda been to what I can and will make happen.
