willbewell, Just read part of your thread and wanted to give you BIG HUGS!
Our sitchs are so similar in many ways. I can really relate to what you are going through.
Try not to rationalize your H's irrational decisions/judgement. It will drive you insane! I circle back to the WHY and HOW DID THIS HAPPEN from time to time and it gets me nowhere.
When there is an OW is the picture they cannot think straight. The OP is like an addiction--they think they need it and it gives them this "high" they think that will fulfill any "happiness issues" that they have. And they refuse to give it up.
Focus on you and your darling children. Especially on YOU.
Look for areas of personal growth (180s) and try to think of something that gives you joy EVERY DAY, even if it is something small or seamingly insignificant.
COme here often. Lots of people (including me) can really relate to you!
M- 18 T-21 S-14,11 & 10 BD 6-18-2012 (OW-EA) H moved out 11-3-2012 10-5-13 Me- I want a divorce. I want to move on w my life. 11-25-13 Jointly filed.