I'm sorry you're caught in this difficult situation. I guess I can't really relate to this situation directly since I no longer have any extended family... or friends either for that matter.

It seems like I've always had interests that were different from anyone else I ever knew. I guess that's perhaps part of the reason I've gradually become more-&-more reclusive.
I've been a very secretive person pretty-much all of my life. (It's a long story.) Somehow, I don't know how, I learned very early in life that there were things about myself that I must never talk about with anyone. And so I didn't... and I still don't. And over time the tendency has spread throughout my day-to-day life. I just keep my thoughts to myself. My personal opinion is that this is often for the best.