It must be something in the air becuase I have been feeling much like you working my azz of on the 180's, supporting the family and relating better to the W with no give on her side. But then I tell myself that the best things in life are worth fighting for and I have never walked away from a challenge before in my life. Why should this be different? There is a chance she could move or proceed with a D, but in the end I took the high road.
Sometimes I think though that this high road is a lonely spot to be in. I would rather be here than how others have dealt with marital problems. Hang in there.