You don't even know me

You look at me,
you see a happy little girl.
But is that happy little girl really me?
No, she's what you want to see,
But she's oh so fake, she's not the real me.
She seems so happy,
but that's just not me.
I pretend she's real,
but she could never be the real me.
With the life I live,
I'm always able to come up with disguises to hide the me I don't want you to see.
But you don't even try....
just try to figure out if she's the real me.
Then you'll discover all my little secrets....
including the biggest one of all.....that you don't even know me.