Well for one I have no intention of having friends and family and for two given my familial medical history I'll probably get cancer around the same time. My end goal would be to put myself into a situation where survival is minimum, so even if I can't kill myself with a bullet then heat stroke, dehydration, or exposure will finish the job.

But I'll also admit I'm kinda hoping I get killed before I'm 30, want to beat my grandfather's record of 32. Passive suicidality ftw.