Garry, you cannot worry about what the outcome is going to be months down the road; because if it's still D, then you will have wasted time getting Garry back to a better person.
She's going to make her decision on this with or without you; trust me. If she sees that you are a much stronger, more improved Garry; the chances that the outcome you seek is going to be greater.
Now don't waste time worrying over something that you cannot control. Reclaim your life; and let your W decide. She is the one deciding anyway; give her something to think about.