Hi captain blithering
I expressed to the elders and to my wife most of my doubts.
That lifted a weight from my chest. So I was able to step down as elder and for me it was important to be honest especially towards my wife. The elders might want to continue to help you spiritually. The only thing they are able to tell you is to wait on Jehovah and that everyone has certain doubts.
If you tell your wife and also the elders, they will understand "why" you are fading.
If you have a loving wife she will respect your feelings and thoughts. My wife doesn't respect my feelings (or at least she is learning it over time). One suggestion I can give you. Do not try to reason too much with your wife or don't give her the impression that you want to change her belief.
Anyway I wish you all the best and I feel for you.
Daniel