Friend 1: Did you?
Depressed friend 2: I didn't!
Friend one: Swear on your life!
Depressed friend 2: I swear.
A week later friend 2 dropped dead to their utter delight.
Alright listen up, this ain't rocket science. This friend was super depressed (like you) and wanted to die. When they swore on their life, they were basically making a deal with the universe to kick the bucket. Boom, dead! And they were happy about it, which is kinda messed up but hey, at least they got what they wanted, unlike you.