I don't know why you keep thinking there's an A. After going through your story again, it really does sound like your W is someone who is just tired of putting up with your issues for so long and wants a fresh start.
You said in your very first post..."One of the issues in the marriage was that she did EVERYTHING, cooking, cleaning, etc., while working a full time job. I had a assumed that since I made much more money, I was exempt from most chores. I did the manly stuff like take the garbage out, clean the garage. But, I never planned dates or put any effort into showing her that I truly cared. The more I do around the house, the more I realize she's been exhausted. "
Mixed in with your bipolar disorder, I can see how things can get tiring for her. Keep concentrating on that and not an A.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.