My ex husband midlife crisis has been by far the hardest thing i had to face.... Detachment was NOT something i understood.. I thought acceptance would bring it... It brought some but not all.. NOT having expectation now that also helped.. Don' t let it become your crisis.. That is where i got stuck.. I have 2 books to recommend: The irritable male syndrome by Jed Diamond, and Men who hate women and the women who love them by Susan Forward... They might shed a light on their behavior and help you realize that eventho we have our faults, we are not monsters.. Everyone has faults.. perfection doesn' t exist and the fact that we had many, many years with them is proof that they could live with it and they accepted us as we did with them.. It doesn' t take 20 years to realize that you are not happy... Don' t buy it !!