Well, for what it's worth, 1313. I think you should go for it with your letter. What do you have to lose?
Above all, if it makes you feel better inside, then that is what truly matters. If it is part of your own healing process, then put it out there.
H: 44, Me: 45 Married: 20 y Together: 25 y no kids Walk away: 12/15 Asked for temp separation 12/25/15 PA confirmed 3/16 (apparently neither the first, nor the last PA he has had) H filed for D 5/16