Irish, An excellent posting. If she returns and you want her back, the marriage will be a brand new one and things will have to be different and remain that way. You can't go back to the old marriage because it has died. Both of you have been on a journey and each of you will have changed quite a bit when you reach the end of the path. Let's hope that she'll be a more mature woman who will come to realize what she's lost and now she has to work very hard to get back.
You, my friend, are doing exceptionally well. Keep up the good work!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.