Hello James 2128: You know... I'm sorry to have to write this... but the cold hard reality is that if your friend is truly determined to kill herself, there's not much you or anyone else can do to prevent it (unless she's a minor & her mom can have her involuntarily hospitalized.) I've been there more than once... The best you can do is to be with her as much as is practical & let her know she can reach out to you at any time she wants. Of course, also try to get anything she might use to kill herself out of her reach. You can also encourage her to seek mental health services, including hospitalization if necessary. Consider calling a suicide prevention hotline as well for additional support & information.

If you & her mom are on good terms, perhaps between the two of you, you can keep a close watch of her & both encourage her to get the help she needs, including hopefully some individual therapy if she does not already have it. But also, be sure & take care of yourself too. Being there for someone who is suicidal can be wearing in the extreme. And, of course, if the person does ultimately end her life, then there is allot of regret, guilt, & self-doubt that gets left behind... to say nothing of the fact that one person's suicide tends to bestow permission to do the same on those who were close to the person.

I wish you all the best...