She said there was no one else in the picture and i believe her.
Based on what? I read your past sitch, and there's been OM before, and she's certainly acting like there is again (re-writing marital history, no affection, no feelings for you, "needs space" (ugh), etc.
I ask because not only are the signs there and she's done it before, but because you said it was a dealbreaker for you.