The only reason I would ask my WAH if it is OK to date would be if he would have told me he wanted to "revisit" our M. I wouldnt ask a "friends'" permission and certainly wouldnt ask permission from a person that had made it very clear I wasnt "good enough" for him.
Boring details: I decided to allow myself to fall for someone, after he came back from a trip during which he was supposed to think about our M. I had found out she was with him the whole time...
Every case is different. I had made it clear, I was moving on.He didnt believe me. His problem. K