Originally Posted by
PohsFriend 
You can stay married with 1% hope but divorce requires certainty.
While I agree with the other points in your post, I gotta disagree with this. There is no certainty in life. We make the best decisions we can based on the information we have. If I waited to leave until I was 100% sure, without a shred of doubt, I would still be married to an A and miserable.
There is a tipping point, when the pain of staying becomes bigger than the fear of leaving. It's not 100%, it's just when the bad outweighs the good.
L