Woe! lots to be said about this topic. For me , it was the absolute haunting of needing to know WHY? WHY WHY WHY. ? Never would it leave me alone and I could not see any motion forward without this answer . And it needed to be something I could understand and validate . To me, he appeared to be seeking some kind of compassion from me for this terrible mental breakdown he had. I do not need to tell you... compassion was not even on the list and I was enraged. It almost felt ( at times) that we were competing to see who had more pain. I just needed to know in my heart and soul WHY this happened. So, I have googled, read every book, researched , listened etc etc... And I am convinced and will not be unconvinced ( going back and forth is hell ) When you read about all the different types of affairs ( serial cheaters, exit affairs, sex addicts , thrill seekers and on and on ) .. he never fit into any of those catagories in the 35 years I have been with him . What he did do is .... told me he never loved me and wanted out, he was in a deep rage and depression, he slept when he was not blaming, he struggled to explain the unexplainable, he never had anything on his face but a deep furrowed gimace, he was restless to the extreme, he was impatient . He could not sleep. His mood swings were so extreme i still afraid of him. He would be kind and then be stabbingly cruel. He could care less if I sobbed up a lung. He was incredibly arrogant. He was so forgetfull he could not do his job and lashed out at co workers and endlessly hated them. He felt " no one used his actual skills " in the workplace. He was secretive and dismissive. He quit an extremely EXTREMELY high paying job ( unspeakable ) , he looked for apartments to find out where he "belonged", he reminicsed endlessly. He lied. His grandchildren got on his nerves so bad .. he physically grabbed them. He would not listen to anything or anyone. He simply walked away from conversations. He asked odd questions : " do you think there is something wrong with me ?" and `do you think I am selfish`. He felt controlled and smotherred. He was unbotherred and did not see or respond AT ALL to anyones pain. He refused advise. He was trying to crawl out of his own skin. He got close.. emotional.. and pulled away just as quickly. He was avoidant. He was mean to his children and stated to tell them of his plan to leave . He thought it was all normal `people grow apart... no need for dramatics. He was sufferring , there is no question. He was having an affair with the time of women he has spent decades trying `not to raise`. I could go on... but you all know how it goes. All of this , plus hours and thousands on therapists ... I do believe he just disintigrated and was powerless. I just needed to know WHY. I remember asking the therapist .. `I said , Ì have to know why É`. She looked at me and said `I think we know why`. He was a man coming apart , undone, unravelled from so many issues that he managed to ignore , avoid etc from a very young age. It had nothing to do with you`. I now know why.. and can feel acceptance that I could never feel before. I am OKAY with the `Why`now. That has taken 15 months. It diminishes my pain of his affair .. maybe .. just maybe 1 % . I am convinced a midlife crisis affair happens for reasons very different than other `types`of affairs. A `thrill seeker or sex addict etc`does not fold up his entire life . I am convinced finally. My husband and I have talked this subject to death...