I have a friend at church who is suicidal, he’s in the same grade as my brother (though my brother’s old for his class bc he has a November birthday) I want to show him this but I don’t know if it will trigger something bad
I think I agree, though I don't know KitCat's friend. Like I commented earlier, I've used that advice many times. It especially kept me alive during high school.
You asked how to outlive yourself. It's easier to be one's own worst enemy. Taking that more difficult path keeps you alive. It is worth trying something different. Just because you and I feel there is no way to be truly happy doesn't mean we are telling the truth to ourselves. Go deeper. Staying blinded to yourself is their goal in keeping you down.