I any case, remember that the non-JW you is better than the JW you. Even if you don't talk to him about it directly (DON'T), remember to keep rapport high. He will want to know where all these positive changes are coming from!
In his mind- leaving Jah= ruining your life. "There is no light outside of Jahs org" Dubs think their lives will fall apart. He will think you are "turning your back on Jah". You NEED to prove otherwise.
Prove that you aren't controlled by Satan. Be patient, and please remember that he's under mind control. He WILL react adversely. Possibly even overreact. Anything he does, no matter how drastic, will be justified in his mind if it means "helping" you. Expect the worst.
READ READ READ. Start with Steve Hassan's books, then RF's books to show holes in doctrine. The longer you can keep his guard down, the more progress you will be able to make. Almost every success story we hear on here starts with the unbeliever slowly but surely helping the other to think. The full on attack will only hurt, and put his guard up toward you.