People who you may not see often but you they are always there. You may have arguments but you never say anything behind their back and you stick together like a team. You can tell them anything, and they can definatly keep any secret :) How ever old or young you can never lose your best friend. It take a long time to find a best friend but when you do find them you have them for life.
Where a guy asks a girl to prom as a date but she "prom friendzones" him by saying: "let's go as friends". The girl hasn't got the courage to reject the guy.
See THE FRIENDZONE
Guy: "Hey, will you go to prom with me?"
Girl: "I'd love to ... let's go as friends"