Do you consider die is an irresponsible behavior?

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A master commit suicide, no one knows the reason, most of people say that he chose this because of pressure. Yeah, pressure of study, to graduate, to publish paper, to get a good job. My friend says she can fully understand his situation, people around us consider us to be intellectual, study for years and surely will be better off, living happily with a beautiful wife, good job, high salary, they don't even know our problems. But she won't agree with the measures he'd taken, she thinks killing oneself is coward, and is irresponsible for his parents and friends and all those who love him. What do you think, death is an irresposible and escape from world?