But he dumped me soon after their relationship started, maybe even before it became physical, so I guess it wasn't shrouded in secrecy. Plus they live in different states, so that will keep it fresh.
He is so used to traveling for work, so he probably won't really see her a lot less than he did before.

Thanks for your kind words, Mu but had I been a great wife I wouldn't have been in this situation. Unlike other situations I read about here where the LBS was the person bending over backwards to hold it all together, I feel like I was the guiltier party trying hard to push him away. And putting a lot of stress on him.
It wasn't all me of course, but I certainly can't deny my part and pretend to be the scorned one.