Just remember. This is great advice, but she may resent you for it. It is hard, but you are being there for her when she needs it. When she pulls through this phase, if it isnt to late, she will eventually realize the care you showed, and will be thankful. Just dont expect to see ANY kind of gratitude.

As for being with a woman, leaving her husband, etc... its in the past. That is one of the issues with Bipolar. Risky behaviours, sexual partners, etc. The thing to remember is focus on the here and now. Regardless of what wrongs were done to her in the past, if she doesnt get help in the here and now, it wont matter.

On top of the advice, it might be an idea to let her know that you care about her, and have actually met MANY people on this site that can relate first hand to what she may be going through. Sometimes when you get into those suicidal states, you feel that you are alone, that nobody else can understand what you are going through. Low and Behold... this is obviously not the case.

Take care of your friend, and make sure you continue to take care of yourself. Sometimes we forget our own health when we get wrapped up in the problems of others.