Dottie if he were my friend I'd ask him how he intends to do it. Gun? Hang himself? Pills? I'd tell him how awful it will be for you to lose the both of them and if he really had love in his heart for you...he wouldn't leave you that way after losing Patty.

What can you do to help....just talk to him and tell him how you feel. He shouldn't have told you of his plans..ultimately it's his decision and I'm so sorry he planted this fear and caused more pain for you.