Watching but never watched
Seen but never really looked at
Listened to but not really heard
Invisible as the air
No one notices when im there
No one knows when I cry
Or when I sometimes wish to die
No one notices it I cut my hair, stub my toe
Or breath the air
Wonder if they would notice if im not there.

Justina Blue

http://www.poemhunter.com/poem/living-ghost-2/