I’ve been there, and this is one of those situations that requires professional help, not random advice from the Internet. If you’re in the U.S., call the National Suicide Prevention Lifeline at 1-800-273-8255 and explain the situation. They can assist you further. If you’re in some other country, just Google for your local equivalent.
This seems to be useful, specific and actionable advice from a random on the internet.
This seems to be useful, specific and actionable advice from a random on the internet.