Living in a world where no one acknowledges you or your actions. You can speak to someone but they won't listen, you can tap someone on the shoulder, but they won't turn around, you can hit someone and they won't even so much as flinch. You can also do as you place, but think about it eventually you'll just get bored of it. Finally when it is your turn to die, not a single person in the world would react, because in their minds you didn't even exist.
If I lived in a world like that I would welcome death with open arms and give it a great big hug. (My god I've just depressed myself.)