I have always remained faithful to my H. The separations were to give us space to work on ourselves so that we could be the best for each other.

I understand looking at these sites when separated, but acting on it is a totally different realm. Besides, this has been my H's MO all his adult life. He claims that I was the only one he had ever been faithful to (even made this claim while he was in the affairs).
He and I met on the internet. He cheated on his first W through internet dating (as well as other ways). I caught him twice checking out singles sites earlier in our relationship.