Ghost and their beings?

i remember when i was younger in middle, i was going to the nurses office i had to go to the bthrm......i'm half way down the hallway i hear footsteps,i look back nothing there..i know to real human being was there.....that day we had test..and only pass was if it was a real emergency. Anyways..at the end of the hallway i turn around again..i see this young looking boy around the age of 14...shirt,pants and no shoes..staring right at me....... i also asked someone else about this but..they didnt help much thy said..maybe he died on the grounds...maybe attetened tht school, how long was tht skool there for? is wht thy say true? or am i going nuts?