What snapped me out of my suicidal funk was realizing what that would do to my mother. No parent can ever truly get over a child commuting suicide. That's all the advice I have.
He does not care about his parents or brother, again he's a misanthrope.
Though I wonder is he could be doing it for attention because he says if he had the chance he probably would have killed himself earlier... but he's afraid of being disabled? I really don't think someone in a depressed and suicidal mood would care about it failing and becoming disabled.
RED FLAGS, THEY'RE A RAISING!
Right you are Bubs. When someone is truly a misanthropist, gives no fucks, depressed, and wants to kill themselves they don't care about the consequence. I smell attention seeking behavior though that's not a reason to write someone off. Carefully press on Bubs.