I have a friend who wants to kill herself. In a very violent way. And I can’t seem to talk her out of it.
I you think that she is a danger to herself (or others) then you should call the proper authorities.
As someone who has gone through the same thing and had someone call the authorities on me I endorse this course of action. There’s quite a few things I’ve experienced that I wouldn’t have had I done something as drastic as suicide.