I think a part of him wants to believe that she wouldn't cheat on him.
Of course he wants to believe this! If he didn't, it would shatter his perfect little fantasy!
And I think deep down he knows you haven't been with anyone else. I'm telling ya, I have a strong feeling it's the drama queen sinking her venom in further and further...This skank's desperate and will do whatever she feels she has to do to keep your H on her side.
Getting over a painful experience is much like crossing monkey bars. You have to let go at some point in order to move forward. ~ Joseph Campbell
