Weep and I'm weeping with you.
I as well. Bryan, I am so very very sorry. Her letter reads similarly to one my sister once wrote me. From what you've told me about her, I agree with Six in that eventually she will leave this organization. It might be many years, but she will part ways with them. And when she does, be there for her as you should now. You have a right to be hurt and angry, but if you can find it within yourself to keep communicating with her it will do nothing but keep the love you have for her alive.
She has let you know how you can reach out to her, so take her up on it. Write letters, keep them short and breezy but always let her know how much you care for her. Do this, and when she has reached our age nothing will mean more to her than all those letters you wrote her that were full of love.
Bryan, you've got a lot of support here. Many of us have been through something similar. Just know there are people here who care for you, not because your butt is in a seat listening to a mind numbing talk at a Kingdom Hall, but because you are your own person and therefore unique. Hang in there my friend.
Chris