Mrs.D. Even though you are now D, I personally do not think that you need to give up and move on.

There are plenty of stats (even if they are low) that indicate some people DO reconnect and re-marry.

If that is what you want. If your X is not now M to someone else, then even though he is seeing an OW, he MIGHT still be available.

You are getting some really good advice if you do want to pursue that route, IMHO.

It is a good idea if you move forward with the idea that you are D and may not ever re-connect with your H in anything more than a friendship way.

Right now... no matter WHAT you do... have no expectations...

No one has a crystal ball and who knows... if you work on yourself and your X notices... he might even approach you one day in the future and see if the two of you might get back together...

YOU decide how you want to proceed and working on yourself will benefit you, no matter what the future brings.