I am ready to GAL and leave him behind. Is he a wayward husband or walk-away husband?
it does not matter RIGHT THIS MINUTE if he is having an affair or if he is just 'checked-out' of the marriage. there will be time to deal with that side of things later.
right now, you need to put EP front and center and start focusing your attention on her. GAL will help with that. you have already said that YOU feel better when you are out doing your thing...ask yourself this...isn't that what life is about. if your husband does not want to share that with you right now, that is his problem.
Getting out will allow you to figure out what it is YOU want to do for the rest of your life, whether your husband decides to join you or not. You have to learn how you can be happy. You have to learn that you can be an independent woman (even if you are married) and that your husband is your compliment...not your everything. Does that make sense?