My friend, you are such a good friend to her. She is lucky to have you in her life. Sounds like you are the only one. Probably feels that way as well. You are probably feeling guilty for feeling burdened. Don't let guilt have another second of your life. You are tired and that's what you feel guilty about. But you are human so your bound to get tired. You will get lots of wonderful advice from your family here on blurtit. So I want to approach you from a different angle. We are a family out here, if you need to vent or talk or just ask for some advice come to us. YOU will need support to support her. You are all she has. You have us. Let us encourage you and remind you that you DO make a difference. YOU ARE doing all you can for her. If she is going to commit suicide unfortunately there may be nothing ANYONE can do. But you are already doing for her all you can. So my answer to your question of "How many times can you be expected to stop her?" I would say as many as it takes, which puts A LOT on you so YOU need to seek help and support so you continue to be strong to keep stopping her. We are here for you Mr. Walt. ☺
Not a rhetorical question: How many times can I be expected to stop a friend's suicide? I have stopped it 4 times in the last couple years. I told her to get counseling, and offered to pay for it - but she still refuses to go.
Maybe you could get a family member to have her committed to a facility, so she gets some counseling.
Suicide is a serious threat, you're a good friend to help her.