I've been reading your sitch off and on. When the separation began, I knew it would only lead her to living the single married life.
I felt like your wife did. I thought I didn't have the feelings that I should have toward my H anymore either. I rewrote history as well. It's not over. What kept me was that I did NOT want to be a part time mom, my beliefs of marriage, and that my H was making changes and doing things that made me realize I was crazy to want to leave him. From there is where I became educated on what was going on with me. Marriage is hard work, and those love feelings are going to change in whatever relationship you are in. Unless I wanted to change partners regularly I wasn't going to find what I was looking for. Now, I have grown to a place where I know what love is, what marriage is, and what I want. Your wife can get there.