i'm a girl robot with half heart

Who am I?
I know my name but always lost my way to find my self
This world like an outstanding drama in everyone life
You're the director and I'm just an artist

An artist that must smile when her heart is crying
And must laugh where the nothing funny
Cheer up everyone with her movie
But cannot look to her deep heart
Say "do not like" is forbidden maybe
Always smile and like that comes from lips

Even there is a script in my hand
My eyes cannot read it because the tears cover them
The light in the studio cannot light up my heart
The applause from people cannot make my tears stop melting in heart

When it's a mellow movie and I'm crying on it
It's fell like it's my real tears
Tears that I can't show in my life
The tears of my heart