Ultimately, my vote goes to the extreme option (
>>6). Yes, it's rather dark, but that ultimatum will likely snap her back to sanity. Only dark and cruel shit like that gets through to those too gone to use that odd device called a "brain" we have situated at the top of our bodies. Worst case scenario, she actually does it. Close 2nd, she cries and gives up, 3rd she fights back, thus proving that she does want to live and all you have to do is point out that obvious truth. Should she not do any of those, tell her parents and/or someone that absolutely
will make her stop. Sometimes, doing the right thing means being the villain of someone else's story. "Guess I can't be the hero every time." - Sonic The Hedgehog, 2009