Suicide is an interesting phenomenon with multiple causes, some short-sighted (rejection from lover), some circumstantial (not being able to pay debt) and some misguided (not getting admission in a good college). But what sounds to me the most _genuine_ reason for suicide is someone who has contemplated meaning of life for long and hasn't been able to find any inherent reason why he should exist. That person may have friends, financially secure and may love having fun. But internally he may slowly realize the fact that his existence in this world is pointless. How do you call such suicide attempt as stupid? The person has clearly thought through it and decided not to exist.
This doesn't mean I personally endorse suicide. I am a big believer in Absurdism http://en.wikipedia.org/wiki/Absurdism and think the whole point of life is to live in face of absurdity. The realization that you have to live (and it's OK even if you die because existence is pointless after all) gives you incredible power. You are no longer afraid of doing things like quitting your job, talking to girls in a bar, going sky diving and trying drugs. After all, no matter what happens, you have nothing to loose. We all are going to die one day, so why not die _after_ doing whatever your heart desires.