Hi jos,
It's really hard when they look so sad and pathetic. You want to help, but you know you just can't.
The only thing that works for me is to treat my H like another body in the house, almost like an adult child. I am lucky that my kids are D18 and S16, so they can take care of themselves if needed. My H sleeps in the spare room, and has since February of this year. I suspect he was in MLC for 2.5 years before that, but I continued on with my life as I knew nothing of MLC. No OW to my knowledge, but I do suspect a one sided EA with someone from work that he became disenchanted with in December last year.
I don't talk about emotions, ever. I don't let him disrespect anyone in the house. I insist on common courtesy. If he does not tell me where he is, I don't tell him where I am (and if the kids are with me, he won't know where they are either). I let him sleep until noon on weekends and go to bed at 7PM if he wants, but don't modify my schedule because of it (the washing machine and dryer are on the same wall as the head of his bed). If he's not home by the time I clean up the kitchen from dinner, I put the food in the fridge and let him know it is there. I do not change my schedule for anything he wants unless it is something I want as well. I am in the process of recovering the couch and loveseat and don't care if he has no place to sit.
In the past week we have been having discussions that end in acceptable compromises for both of us, where these same discussions were arguments with no resolution before. While he brought one slurpee for D,S and me to share while he got himself a whole one, that is still a good step in the "consideration for others" department. He has been extra nice to the 9 year old guinea pig and cleaned it's cage (That has always been my job by default, with help from the kids). He actually passed along invitations to get-togethers, where he hasn't for 2 years. I take none of that as anything truly positive. It just is.
I do know that when my H feels too close to me, he backs away the next day. I do look at that as a good sign. At least he cares enough to worry about it.
If I could tell you anything, it would be to live your life as you would if your H were not there, being polite a courteous, and placing no importance on anything he does until the day he come to you and says "I can't believe what I have done. Is there any chance for us and if so, what do I need to do to make this right?" JMO, of course.