I'm with Job! (Always, Job writes the most encouraging things!) I often have days like that, where it's just unbearable or I can't stop thinking about that OW thinking about MY husband as if he were hers to think about, etc., even though right now that alien person is not my true husband. The thing is, those days come and go. Sometimes the day is the darkest thing you can imagine and other days you are thankful. Just keep trying to bring thoughts of thankfulness into your head. I think of all the ways my situation could be even worse, and that helps. I try to think of being thankful for what my situation ISN'T, instead of crying over what it is. But also I cry my head off. I go to my church, which is always open and is down the block, and cry my head off, at least once a day and then I pray for a while until I get some strength restored, and then I put one foot in front of the other again.
I believe I will see the bounty of the Lord in the land of the living. Wait for the Lord with courage. Be stouthearted, and wait for the Lord.