I wrote you a whole long post and lost it. Good luck to you, I am so happy that you and Rich are going to give it another shot. I so hope I will get that opportunity some day but it doesn't look too promising.
Take it a day at a time and pray, pray, pray. I know what you mean about never getting them out of your mind. I am still there after 4 years since bomb, 2 1/2 years since he moved and 7 months since D. H has lived with OW of 1 1/2 years for the past 6 months and doesn't speak or associate with me in any way. You give me hope.
Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.