I can not take it anymore.
We all hit our "wall" eventually. You are not alone. I think you will find support here, and hopefully solace in knowing that there are other people who have experienced similar distress.
There is no ownership on her end, never has been and I doubt there ever will be.
You are right. She isn't going to change. For me, things got better when I accepted that, and stopped trying to "help" her behave better, be more polite to people, or make better decisions.
I am scared to leave my room and have put off eating meals until I know she is not around.
I hear you. The positive spin on this is that you are doing what you have to do to create "space" between her and you right now. She's not going to make any adjustments towards that, so as the "adult", you have to.
Sometimes it seems like our pwBPD thrives on chaos. Their emotions are wildly out of control, and they have little or no ability to self-regulate those emotions.
You are already "avoiding" interactions with her it sounds like. When it's impossible to avoid an interaction, do you think it's possible to not provide the "other half" of the conflict by not engaging? So if she says something to provoke you, reply with "I don't know, I'm not sure, mmmmm, if you say so, I can't right now but maybe later" etc. These are "nothing" replies that could slow a conflict down. I eventually decided not to "engage" with my mom. I would suggest
not JADEing. Don't argue. Don't justify. Avoid explaining, and don't defend anything. Avoid offering opinions unless it's about something like the weather, or something you know you agree on. If she's spoiling for a fight, simply don't give it to her. If she wants a fight, she will have to go somewhere else for it.
Save yourself, by not engaging with her.
SET may also help to settle those crazy intense emotions that are causing all the problems.
Not sure if that's helpful or not.