Forgotten soul

There was a girl that no one knew
They saw her every month, week and day
But still she remained unknown
Hidden behind her own hard shell
She walked alone in her valley of thoughts
Was crushed by emotions so hard to tell
She hid her secrets well
And refused to talk to beloved friends
She kept it all to herself
It ended bad, it ended sad
She went away
Never to be seen again
Soon forgotten by every soul
And her memory left alone