Hi Jazz,
Well, this really is an ugly situation. I know, I've lived it.
Even though I had many doubts about the faithfulness of my husband, I couldn't prove anything. To top it off he made it clear to me that he "expected" to be free to remarry in the Kingdom Hall. With his temper, I was not going to test him as to what "or else" meant.
So I chose to get on with my life. For me, that meant that after my divorce was final (when I was legally, if not "scripturally" free) I decided not to delay a physical relationship with the man who would become my second husband. I had no interest in staying in the organization, so I have not regretted that decision one moment.
The sad truth is that you can not get a divorce, stay in the organization, and remarry and stay in good standing, unless your wife commits adultery and confesses. Which doesn't sound likely.
So your choices would seem (on the surface, I don't know your details) to be:
1. Stay married.
2. Get divorced and stay celibate, keeping your good standing in the org.
3. Get divorced, get on with your life, and not care anymore what the organization thinks of you.
I know that if you have family in (as I do) that the choice to leave the organization is agonizing. There are major consequences.
These are hard choices that only you can make, and you shouldn't rush them. I don't advocate anyone going out and finding a partner just to 'get it over with'. so to speak. If my situation hadn't been what it was, I would have stayed single. I know he would have cracked sooner or later. I just chose not to play that game.
I wish you luck.
*hugs*
essie