There are so many wrong things with this situation that I can not beguin to list them all. This is a mind-controling religious cult! Don't get onboard for someone's sake. Hellooooo ...... wife #3 ...... the pattern is not right.
Realize that now he is not a healthy or functional individual. In addition, he is a member of a collective, which he needs AND fears simultaneously. There is nothing you can do for him as he is not even trying to exit, but drag you down a path to gradually renounce to your privacy and your individuality until no trace is left of critical thinking and all hope and souvenir of happines vanishes.
Choose your battles. Realize that you are not 'saving' him nor you are getting a man; You are getting a programed -and seemingly- confused interface to a religious cult. I wish I could be gentle and explain you softly in this time of pain and hurt. But lady, you are flirting not just with a deadly cult that will sacrifice your children without a second thought (Re: blood transfusion), but with an unbalanced man without mental and social stability. You know what you have to do. I see the way you write and I see a well educated person with intelligence. You have done NOTHING wrong and you have tried enough. Get a friend nearby, and finish this unfair and dangerous relationship in one defining motion, and don't ever look back. By the way, cancell all Bible studies and be very asertive about it and hang up when done, as JWs train for YEARS to envelope people undergoing a crisis like yours.
No matter what he replies back, you'll look back one day and will be proud of doing the right thing. I promise you.
Respectfuly,
Gerard