I think the number one argument against committing suicide shouldn't be God, or the fact that those close to you (though, let's be honest, if you're contemplating suicide you probably don't have all that many people who are actually close to you. Am I right or am I right? . . . Is this thing on?) will be sad, or because "things will get better" . . . it should be because there's a chance you'll survive, but be horribly disabled in some way, which would put you in a way worse place than you were in when you were fully functional and just miserable. Now, not only are you a failure, but a burden, as well. Not to mention, you no longer possess the means to try again! That just doesn't seem worth the risk, however small, to me.
Side note: Actual suicide . . . not all that funny. Just needed to be said.