Supreme, if you live in Brooklyn, contact Rav Dovid Goldwasser. He should be able to help you and help your friend. Purplicious, there are answers to every question one might have in the the Torah. No individual will have any or all answers on the spot, but the best answer to anyone who is asking is “I don’t know the answer to that right now, but maybe we can research that together, or work on that to find someone who can answer that for us.” Because there is always an answer for every question and a reason for everything we do. Not everyone is smart enough or educated enough to know and understand the why’s.
One more thing, personally I don’t take suicide threats lightly. I was involved in too many suicide attempts and rescues to do so. So again, if you know someone in Hatzolah please pass along the information and see if they can help your friend. This way you can back away knowing that you at least handing over the responsibility to someone else.