Do you have a therapist? Can you talk to him or her about the best way to care for yourself and help him or at least understand him? When I tried to kill myself I ended up in jail. My husband, who was determined to divorce me at the time but has changed his mind) was a God-Send. He jumped into action, thank God because I was on suicide watch and had no idea how to navigate the system or what to do when I got out other than immediately call my therapist. You can be a support for him but he's going to have to want the help. I hope this works out well for you both.