I can recommend NOT "Just Friends" by Shirley P. Glass, and perhaps also My Husband's Affair Became the Best Thing that Ever Happened to Me (can't find my copy right this second to tell you the author, think last name is Berendt, but you can search the title on Amazon). And on Amazon.com you can read excerpts from the book, and reader reviews too. Hope that helps some to answer your questions. I have a zillion sticky note flags sticking out of the NOT "Just Friends" book.
Must sleep now, early a.m. tomorrow.
Forget the former things; do not dwell on the past. See, I am doing a new thing! Is 43:18-19
If it seems slow in coming, wait. It's on its way. It will come right on time. Hab 2:3