I talked to a DB coach today who put a different perspective on things. Maybe it was just the ability to have an interactive conversation for fluid discussion, but it clarified my situation immensely.
The short is that I will need to massively GAL. This will have an effect all its own, or as a worst case, prepare me for moving on. The concept is that my W does not want a marriage, so I need to stop being a spouse. I can continue to live in the same house but must treat my W as a room mate...and a bad room mate at that.
We also discussed scenarios...the couch power struggle, seeing my BIL at the holidays, arguments, and my W continuing contact with OM. Take away is I need to stop acting contrary to what I think or believe...no more acting friendly to my BIL to keep peace, no more allowing my W to push me around any more than I would allow a room mate.
I will work on telling my W when I disagree with something she does or says nicely, while not getting sucked into arguments...especially in front of the kids.
M 17 years 3 kids EA start 2010 ILYBNILWY 1/2014 PA 1/2016 Bomb drop 2/2016 Renig on Bomb drop 4/2016 Living as roommates, EA continues