All I do is “Smile”

All I do is smile
And nobody see’s
The pain behind it
That’s tearing at me

All I do is smile
I try to forget
But those dark memories
Will never leave me

All I do is smile
And you’d never even think
That behind that smile is tears
That I’d never let you see

One day my smile is gone
This is the day you finally realize
That it’s not all rainbows and butterflies
It’s a cold, dark world that nobody wants to see

But I saw it, and it killed me