I think I read it on Phil McGraw's site in an article.. he described threats to leave as a drastic act of abuse...
I saw him in a video say it was worse to threaten to leave for years and NOT leave than to just walk out...
"They will have been half healed after three years... But you just keep threatening them and don't do it"
Something like that...
It is a horrible thing to do to people...
I would tell him to keep negative commentary to himself.
If he's "just looking" then its not info you need.. He's just being negative...
He needs support for how miserable he feels (I don't think he feels any worse than you do, but he's the wayward right now so to his mind the sun rises and sets on his moods) but he's using his kids since he won't talk to a family therapist... That's pretty damaging in my opinion.
I will see if I can find the comment about threatening to leave as being abuse on McGraw's site