OOmpa, so sorry for the pain you are going through. What you are doing is demonstrating great courage and honesty on your part, I hope you gain some strength from that and that and, as Dinah said, you won't be living in limbo anymore. I know you have seen this coming for a while. I have the impression that you have made a few friends on the outside. Share it all with them, I know they will be very sympathetic. Stay close to your son too. It probably would help to get some counseling from someone experienced with those exiting cults. AA too can provide comfort and companionship. It will take some time, but as they say, what doesn't kill you makes you stronger. This will pass.
We can always hope that the ones we love and miss will come around. I believe there will be more and more exposure of the WTBS as being a high control cult. Let's hope the light bulb goes off soon and they can see what a cruel, unloving, and unchristian this practice of shunning is.
Our hearts are with you!