I had a similar situation, my first wife cheated on me after ten years of marriage. I didn't campaign against her, I made her a very financially lucrative offer that she couldn't refuse and she agreed to give me full custody of my son.
I got what I wanted, though I had to start over financially. I took what I wanted from that relationship and moved on. It did take me another ten years to find my current wife, but after over eight years with her I am very happy. Much happier than I was with my first wife...
Your dedication to writing daily for over 7 years is amazing. I know I wouldn't be able to do that and I am a VERY consistent person...