[Liar.]

Hi guys,
Haven't been around the forums in quite a while now but I'm just after a bit of advice.
My girlfriend is severely mentally unwell at the moment, she has been in and out of mental health inpatient care multiple times in the last month but gets discharged every time and told that she is not acute enough to be taking up a bed. Her behaviour can be really aggressive and abusive at times right now, yelling and screaming at me and my family one minute, acting completely normal the next.
I've done all that I can to try and help or get her the help that she desperately needs but I've run out of options. I don't even feel safe around her right now.
I'm trying to be supportive but my sympathy well has run dry and I'm just getting frustrated. Any suggestions on how to deal with this?
Thanks