Yeah, you kill yourself and then what? At the very least, when you're alive, you get to experience boredom... which when viewed from another angle may not be the bad thing it's made out to be. From boredom come ideas.
You left your girlfriend? You *********, at least you had one!! I should kill myself !!
Life's a bitch, lift up your chin, go ahead even if it's meaningless.
Throw rocks at ducks, ride a bike, try woodworking, jerk off in a public restroom...
do something!
(for a fun game, try and guess which one of the above I've never done)