How to stop a best friend from killing herself?

I don't know what kind of question this is, but okay. Get everybody she knows to right down something great about her. My old teacher said that one time one of her students was going to kill herself, but she got this long list of great things about her, and she realized how much she was needed.

I am goin through it right now and my friend HATES her parents and they hate her i really like her and i couldn't live with myself if she kills herself soooo wat i did was: first pull a titanic. I said that if she killed herself i would follow her and do th same and that got her to think. Next i siad reasons y she should live. she is good at Trumpet, dancing, she is smart, she is one of th most beautiful girls i no, and i stated all the things she is good at. The next one really got her to think. I mensioned famous ppl that changed th world and had a bad child hood. I mensioned Oprah Winfry and it really got her to think. Her response was "I wont be able to change the world" and my resopnce was "How do you no someone has to do it and it doesnt have to be th world it could be a town, comunity, or even just a family". Finally i mentioned that it is a sin and u get a one way ticket strait to th hot place and i said that it would get many people depresed and that could lead to them killing themselves too. I said "would i really spend 2 hours talking to you trying to stop you from killing yourself" it was really automatic for me i solve many people's problems.