A fake skin.

A person with smile on face everyday actually having a frail and scaring for hurts heart. They smile, just want to hide their sad. Never think of showing their real emotion. They are wearing a fake skin...
In people's eyes, they are optimistic and having a positive thinking. But in their heart, there are a lot of sadness, scars, sorrow and bleeding wounds. Thought they are happy, actually they are sad. Cry alone in the middle night, lock themselves in a dark room, hurting their body... There are nowhere for them to release their sadness and pain.
So sometimes you'll see some happy persons totally changed their personality in one day or the worst, they find their final destination, die...
Nobody know what are them thinking, what they wanted...
But when the things happened, hence all start to ask the sake, full of why? why? why?
So, try to understand and concern about your friends now before it is too late. They need you.