Validating does not mean that you encourage her to separate. Think of her as vulnerable and scared right now. She needs you. She's sick and she doesn't even know how much she needs you.
Think of her with pity and concern. Try to take yourself out of the equation for a minute. Do for her what you would do for your dearest friend or relative. (Because she is!)
I know its a dance. I just don't think the dark DB is what you need right now, or what will help her.
I was in that dark place where you just don't trust yourself, yet you cycle between thinking that everyone else is wrong at one time and that you need them the next.
Be her most caring friend, right now when she needs you most. This will pay dividends, I promise you. I've been there. I know.
Me 45, H 46, S 23, M 26, Together 30, Bomb 6-2-08, S 6-19-08; H left 12-29-08. H home 12-09, Still MLC in 2012! Me- I have my big girl panties on. Bring it.