Well, if there is an OW involved, did you do anything to bust the affair? Is the OW married?
IMO, you have a tough road here. One to make yourself a happy, confident person (which got way more complicated when your M started falling apart), and you need to bust this A if you can.
Chasing your H isn't going to do it. What can you tell us about this OW?
M-47,W-40,No kids D-filed 5/27/2010 Piecing - 10/21/2010 -=Soon to be banned=-