Am I considered short by any means?

Okay, well I have this friend who is 6'1.5" tall and as far as I can remember he's called me short. I'm 5'11.5" (I was measured at the doctor's office last week for my annual physical) and a 17 year old guy and I never got the impression that I'm short, but according to him I am. So, am I considered short? By the way, I live in the United States of America and if I am short tell me how below average I am.