Hi pubtruth!
I found your story very moving. You ask, in respect of the zealous elder,
How would I kindly tell him it’s a personal decision and he shouldn’t butt in every chance he gets?
In my experience, whenever in life I've asked a question like that, I was basically telling myself the answer. You know what to do. You tell him "it’s a personal decision and you shouldn’t butt in every chance you get?".
You're asking the question because you feel insecure in the situation you're in...and no wonder!...but that situation is intolerable. For your own peace of mind and sanity something has to change, and dealing with this elder presents itself to you as the first step. My advice would be to take that step at the first opportunity.
The only thing is, once you do take that step you might find it is the first step on a new road, so you might want to think hard about whether or not you're ready to set out on that road. It's clear from what you write that you see through the Watchtower...or at least, it certainly sounds like that. You're young. Dealing with growing disillusionment with the constricting society you're in is hard enough on its own, but you are also struggling with all the complexities accompanying an emerging sexuality, and on top of that a sense of bitter betrayal by a friend for whom you had developed intense feelings.
That's a hard mix for anyone to deal with. But you have a number of things on your side, notably a strong sense of truth, and of right and wrong, and those are strengthening and will ultimately help you guide your own course through choppy seas.
That inner honesty is sooner or later going to confront you with the question of whether or not you can bear to stay quietly in the organised world in which you've been brought up, or whether you can see yourself confronting the framework within which you find yourself and stepping outside it. It's not a question of whether or not you're brave enough. I am sure you have courage, because inner honesty of the kind you show brings its own courage. It's a question of whether now is the time or if you feel you can wait.
Being young can be very hard, because feelings are so strong and run so very deep. You've got a lot going for you, like your friends in the world on the outside and your own intelligence. There is no law that says you have to do what your parents do and believe what you've been told to believe, and you're not baptised so you can't be DF'd with all that entails.
In life difficult things often have the simplest solutions. Just do it. Like Yoday says: "Try? There is no try. Just do."
Just my take on your very interesting and moving post. I'll look forward to reading how you get on.