Do you two want to go on and on about who's right and who's wrong or do you want to get your relationship working?
I feel for both of you. Chrissy, I can relate to you because my WAW touched upon many of the same areas you touch upon, and I can relate to your H because I know what it feels like to go through all the emotional turmoil of what the wife is doing behind the H's back - of course let me state my situation/history/details is different than yours - it's just close enough a universe that I can relate.
Mr. H, if you're reading this, take it from me. If Chrissy left you, you might find yourself wishing you had handled things differently. You have to let the past go, because you can't change it. You don't know what the future is, but what you do now affects your future. So all you have is now. If you want your tomorrows to be like your yesterdays, than just keep on doing the same thing and they will. If you want your tomorrows to be better, make changes today. What else can I say? Maybe this: You don't know what you've got until you lose it forever.