I keep noticing how you mention the responsibilities are practically falling all on you. Ask your H to help out! I would tell him how stressful work has been (with your transfer, etc) for you, and if he could help out with something, it would be very much appreciated. Don't talk about stresses in your R because you know that won't help. Slowly try making one request per week and go from there.
Sherry, have you read The Five Love Languages by Chapman? I would suggest it if you haven't. You need to try communicating with your H in his love language(s).
When those thoughts of OW come about, do what Michele says. STOP! Immediately think of something else. That's what I had to do for awhile, and the more I did, the less I have had those meaningless thoughts.
Valerie
"I can't change the direction of the wind, but I can adjust my sails to always reach my destination." ~ author unknown