The suicide can become an exit from this condition of a hopelessness.
The depressed teenagers lose interest in life, in people who surround them.
They cease to communicate with friends, cease to do that did with interest earlier.
A look at them sad, suppressed, they sleep much, talk usually low, tired voice.
Impression such as if they live with a great effort.
They are involved in a vicious circle: the depression conducts to alienation, alienation generates melancholy, melancholy a new round of a depression..