I am really sorry. Keep you head up - 12 years is a long time and regardless of how bad the M was painted by your W - isn't wasn't all bad.
You can decide to DB as long as you see necessary. If you want to be done - then be done. Just don't ever forget what you have learned through this experience.
I really feel like we are meant to learn from this - some we figure out early - some it takes time to figure out the why part of it. Never forget the idea of creating the best life experience you can by keeping a PMA and working on the things you want to improve in your life.
Stay strong. Please keep me updated so I know what is going on.