Brave girl, I am in the same position. Just housemates, nothing more, yet my husband is very controlling, wants to know who I am with, how long I'll be, how much it will cost, I'm living on eggshells all the time. And my young adult kids who still live with us I know feel the same about living on eggshells, I just don't think they have worked out why yet. I am working towards leaving but I need to get myself a more secure job first, and its horrible wanting out but can't yet. I too have felt very along - but I have found it useful being on here, although I haven't posted much, its nice to know there is support out there. I don't have any family here and any Facetime calls I make are monitored, so I don't have anyone to talk to, except on here.
I don't think I have helped, but I hope it may help you with knowing you are not alone. I have struggled for a couple of years now and really wrestled with whether to leave or not, but ultimately we only have one life, and even if that life is living on our own I have reached the conclusion that its better than eggshells.
Keep in contact and let us know how you go x