I'd like to chime in about walkaways and MLCers wanting to return at some point. Not all of them will want to return. Why? Some will think that it is too difficult to return and be viewed by friends, co-workers and family members as cheaters and are waiting for the other shoe to drop, i.e., thinking that they will leave again.
You do have a few (50/50% chance) will make the difficult and hard decision to attempt to return to the spouse/partner that they have left. It may take a year or many years for them to work on themselves and come to realize that what they where looking for was right at the place they ran away from all of the time.
Some will apologize and others will want to sweep the entire saga under the rug and try to move on without discussing what transpired. It is always best to allow them to come to you, listen to what they have to say and keep your expectations at zero. If they do want to return, the old marriage is dead and a new one needs to be created which means, whatever changes that you made along the way must be permanent.
Ultimately, if your spouse/partner does come to you and hints at wanting to try again, you and only you can make the decision as to whether you want to try again. In many cases, they have been MIA too long and you, the lbs, have moved on.
You will know when you've had enough and make the decision as to what you want to do with your life and whether or not you want your spouse/partner back. Until then, continue working on yourself and moving forward.
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.