I so understand how you are feeling. I know she wont leave, and I have nowhere to go or might have jumped ship myself already. Its a tough call, but the more I think about it the more I think you should stay.
A couple of factors. You are doing your GAL, and he sees that. So it adds to that mystery. Also what better time to work on yourself then when your faced with that adversity. You might relapse wondering what he's doing with him away. So learn to deal with it now as your getting good at it now.
I think once your past your guilty feelings, your well on your way to healing and full detachment.
