I finally got my born in, inactive 30+years, then resuming studies husband to read Combatting Mind Control by explaining to him tearfully, that it describes why I feel as strongly as I do and why I have been reacting as I have. At first he flat out refused to read it, saying I '"have no right to ask him to read that" . But one evening, shockingly, after I asked once gain telling him it was about helping him to understand what was happening within ME, he agreed, and agreed to discuss it with me. We did discuss it, but not much. I have to be satisfied that he did read it. He has since quit going to meetings, and studies claiming it was due to my health (extreme stress is a nasty thing). Maybe a planted seed took root? Who knows.
Whatever you do, don't out him , or even speak with the people at the hall. You must never interfere unless you wish a divorce.
Just try to make his non jw-life with you enjoyable, be there for him, listen to him if he ever does want to talk.