One of the reasons why teenagers commit suicide is because they lack self-steem. Either because they feel unloved, ugly or that their lives have no meaning whatsoever. They just look at the mirror and hate the person looking back at them. They look around and hate all the things they have or the things they lack.
I knew a girl, she had 15 and killed herself last year. They found her in her closet, she hung herself. Apparently she had everything, a loving family, her brother is a friend of mine, and he was such a nice brother for her. She had lots of friends who are still mourning her. No one can explain why she did it. The truth is, little can we do to stop someone from comitting suicide.