Bipolar Disorder Support Group
Bipolar disorder is not just a single disorder, but a category of mood disorders marked by periods of abnormally high energy and euphoria, often accompanied by bouts of clinical depression. This is the place to talk about your experience with bipolar disorder, learn from others' experiences, and find support.
When my daughter was 14 she tried suicide. Luckily it was a failed attempt. I wish one of her friends had talk to me.
Just saying, it might be a good idea.
Try to do your best, any of the choices you mention and others have add are reasonable and may work (and may not).
But the most important thing that you can do and only depends on you is stand by her. giving her your support.
Hope that things work out for the two of you.