Happiness?

A simple word. 9 letters. Two p's, two s's. A word people are taught from a young age.
But what makes people happy? What is happiness?
Is laughing being happy?
Is smiling being happy?
Enjoying the moment your in?
Having friends?
No one knows what happiness is so when someone says "You don't have depression because your happy and have a perfect life." Well, then there wrong because you could be the happiest person in the world and still have depression. Everyone has felt depression, sometimes not as strong as others but still felt the pain of it. Someone else can't decide whether or not you have depression or if your happy. People think that my smiles are happy and innocent when really every time I smile I slowly lose the happiness inside of me. How many smiles did you fake today? How many times did you fake a laugh to make people thing that you are okay? How many times have you lied to someone saying "oh, I'm okay" or "I'm fine" ? No one knows the meaning of happiness. The dictionary is just saying what people want to hear, what people hope to believe.