I'm sorry, DY.
If you're an introvert, you slog through the loneliness, slowly rebuild a new life and after a year or two (or three) you recover and rebuild a new life.
If you're an extrovert, I understand how daunting that might feel to give up the social activity that the congregation provides, not to mention the distressing possibility of losing family.
There are no easy answers. I understand the fear of losing emotional and financial support of family.
It seems like you're stuck with choosing the "least awful" alternative.
Please use us for support. Though it's "virtual," it's no less real than real-life friendships. Lots of folks here are willing to meet up in real life, too. If you live near DC, you can PM me and I would love to meet up!
We've been there. It's hard. No one is promising "easy." In fact, we can promise "hard," but it's the kind of "hard" that works like a trial by fire; you're stronger on the other side.