flapjack, please forgive me if this is too blunt or sounds too judgmental, but this guy needs to be out of your life, period. No one of his age should in any way be even putting you in a situation where you feel emotionally responsible, or talking him out of suicide, and certainly not having any sexual talk or making moves on you, as you described. This relationship is hurting you in so many ways. Take care of you first and always and kick this guy out of your life. You deserve better for yourself. He's so wrong in so many ways. Stay with the friends who respect you and care for you -- he doesn't, his actions show that even if his words try to say otherwise.

Be safe and be well,

mtd