You simply cannot just tell one that is suicidal to receive help. That is not right, you need to be there for him and let him know how valuable his life is. I'm sorry that this unfortunate situation has happened to you, but just take a second and try to imagine what he's going through. His stress is building up daily and if it is driving him to wanting to kill himself, this is a sign that he shouldn't just get help, he needs help. You can be the one that supplies that to him, if he already trusts you enough of course. Give him advice, take his mind off of things. When you speak to him, try to spark up some sort of positivity, this is get his attention off of the suicidal tendencies. Don't let him succeed, let him know that he can't go, his life is so precious and the stress he suffers now will not outweigh the happiness and the amazing life he has prepared for him.