I wouldn't call what he's going through a "Mid-Life Crisis." It's more of a Peter Pan syndrome. He doesn't want to grow up and have to live a grown up life.
Either way it's not fun.
Sounds like infatuation with OW is lessening. That's good.
Me: 47, Ds 17-13, D final 6-11 http://tinyurl.com/yk4e2tz http://tiny.cc/thread2 http://tinyurl.com/ydtphqu http://tinyurl.com/thread4 http://tinyurl.com/3sm78k6 http://tinyurl.com/thread6