How do you overcome the thought that you wasted you life? 52, married 25 years and contemplating D.

Updated: I have read all the replies and thanks. I'm pretty emotionally stable and if I did end up divorced I'd certainly look towards the future instead of dwelling on the past. Just an FYI, of the 25 years of my marriage, most of it has consisted of a lazy stay at home wife with all that entails. A constant thorn in the flesh so to speak.