I agree with so much of what has been said . .

In particular . .

Don't give up on your friend . .

Seek help, advice, guidance - for her and yourself . .

Try to keep some emotional distance from things (far easier for me to say than for you to do . . )

Don't damage yourself in the process of trying to help this friend . .

Accept that, if it comes to the worst, it's not your fault . .

Whatever happens, don't hide or deny your own emotions; the more emotionally draining this situation becomes the more emotional support you will need.

Good luck

G.