In kindergarten your idea of a good friend was the person who let you have the red crayon when all that was left was the ugly black one.
In primary school your idea of a good friend was the person who went to the bathroom with you; held your hand as you walked through the scary halls; helped you stand up to the class bully; shared their lunch with you when you forgot yours on the bus; saved a seat on the back of the bus for you; knew who you had a crush on and never understood why.
In secondary school your idea of a good friend was the person who let you copy their social studies homework; went to that "cool" party with you so you wouldn't wind up being the only freshie there; did not let you lunch alone.
In pre-university your idea of a good friend was the person who gave you rides in their new car; convinced your parents that you shouldn't be grounded; consoled you when you broke up with Nick or Susan; found you a date to the prom or went to the prom with you (both without dates); helped you pick a university and assured you that you would get into that university; helped you deal with your parents who were having a hard time letting you go.
On the threshold of adulthood your idea of a good friend was the person who was there when you just couldn't deal with your parents; assured you that now that you and Nick or you and Susan were back together, you could make it through anything; just silently hugged you as you looked through blurry eyes at 18 years of memories; and reassured you that you would make it in university as well as you had these past 18 years; and most importantly sent you off to university knowing you were loved.