Habitacker,
I think our WAW suffer from very similar problems. My wife used to think I hung the moon. Now, she says I don't even know who I am anymore. Her feelings for me have changed, due to our bad marriage habits, and she is trying to find herself. Unfortunately, she feels she must do this alone. So much alone, that she is going to move out.
The only thing that makes my wife happy right now is extreme social behavior. Being out with friends, co-workers. She doesn't drink every time, but she is out late everytime she canbe. this puts a huge amount of stress on me because all indicators point to an affair. But there is no affair. I get very jealous at times.
I have to let go, and let her find herself. Let her find her happiness. HER WAY. If I can stay happy and positive in my life, and she can be happy in hers, maybe the good memories, our kids, and the great life we have earned for ourselves will appear to her and she will want to participate.