Hi BW,
Giving what I know, it is better to fade than to quit. You should wait till 18, but you can start your fade now. Here's why I think you should wait until 18. (and set up your aunt, and your life, for post 18)
I think in FL, you can't move out without your parents consent until 18.
Your father could be removed as elder if you tell.
Post 18 fade excuses get easier ie working, busy, depressed, sick, confused......whatever.
Tough it out now, and do everything you can to pre-fade, get out of the house, try to meet others outside the BORG, and set up your life, and I think that would do the least damage.
Keep posting, we care!
HBH