Husband has expressed to me that he would choose Jehovah over me, in a fit of rage of course. I love him and our marriage is great in every way, except for me having to fake the faith thing for many years now. He is hardcore, so it does not look good for me. However, this faking stuff is weighing heavier as time passes by.
You can't always trust what's said in a fit of rage, to be sure. If your marriage is otherwise good, then you probably have good chances of being able to at least maintain a dialog about how to move forward instead of him just blowing up and leaving you. It might be worthwhile to see a therapist or counselor of some kind for a little while in order to learn how best to communicate in order to keep things civil while working towards a solution that you can both live with. A therapist can also help you work out just what it is that you actually want as well as providing support before and after you call it quits - that support will likely make a huge difference if things do go as badly as you fear.
It sounds like you've been going through the motions for quite some time. I don't know how you do it. The year I spent at it was miserable and it was affecting every aspect of my life and it definitely did some damage to my marriage as well. Perhaps you don't have to jump in with both feet, though - maybe you can talk to him simply about taking some time off from the JW thing to work through your doubts...you might find that it's not that much easier than faking it, or you might find that it's the best thing you've ever done. That'll really inform your decision whether or not to make a stand.