What are your thoughts and feelings about being depression, loneliness, heartbreaks, being different from your peers, and having to put up a front? How do/would you deal with some of these issues.
I feel that these emotions are often faced by the teenagers. As they are going through puberty, they might think the the "children world" is too childish, and the "adult world" is to different to understand. Because of this, they feel lonely and not understood.
One could consult a friend or a trustworthy adult and ask for their opinion and solutions. Listening to music also helps a lot.