What is difference between friend and best friend ? Explain in poem

This thing one girl ask me after my reply she was shocked so , read the poem .

A friend know your goods but a best friend knows more than yourself you ever knew , one day a friend will leave you permanently but a best friend will leave everything for you , a friend will use you and throw but a best friend know how to make best out of waste , that smile is temporary for your friend until you have something that he want but that laugh of your best friend make you laugh in bad situation , a friend may betray you in school but a best friend know what will that fool do outside alone I should also go , [ last but not the least ] I can't describe a best friend from a single word but i can describe a friend that he is a cheater. I also have a girl bestie at the time of writing our friendship is in danger but i will never leave her in her dark time. I dedicate this poem to her .