A face in the crowd

I am a misspelled name A blurred edge of a picture Used when needed, let me alone. The unsought lost The unnoticed extra My world is empty A hollow, aching cage Pass me by with eyes not seeing I retreat in my shell Hide me from the world, I pray No one knows my story Broken pieces begging for mend They avert their eyes If my pain were physical No skin left untainted Carrying a silent burden Bound by invisible chains