god when the head master wasnt there a 15 year old and black belt to my yelllow belt and me being 17 at the time wasnt a problem for me cuz we were friends outside training and in the same high school as each other i helped him with his school work and he took the TKD classes twice a week showing me what to do watch my contact and so on and so forth i didnt run cuz i couldnt take it i respected him because master had that in stone in my head higher belts than you no matter the age have to be treated with the same respect as master is treated and thats of high respect. sounds like your "friend" couldnt handle you being higher than him.