What are you doing for GAL? If you're not doing it anyway, then start going out on social engagements. Have the time of your life. Without the wife of course. Not just other dudes either. Nothing wrong with women being on these social engagements. After all, you're moving on, doing GAL.
I am going to extra judo training sessions and sometimes I go out with friends from work. Watched a UFC fight this past weekend. I drive for uber occasionally as well. I don't feel comfortable doing anything with other women. I'm not going to seek any kind of relationship with a female until this thing is resolved completely. I would not want to have to answer for that extra complication when I trying to reconcile (assuming I even get that chance). I don't even want that right now.
I didn't say anything about a relationship. No point in diving head first into the deep end. I'm talking about casual fun. Coffee...lunch...movie...whatever. You'll feel like a million bucks laughing and having a good time with a member of the opposite sex and it'll show your wife that she really is in extreme danger of losing you and that you'll be just fine without her. I've lived this myself and seen it dozens of times. It works better than anything else you're going to try. It has worked for others right here.