Sister/friend

You mean the world to me,
not just as a friend,
i see you as my sister,
we'll be together till the end.
i feel as if i can tell you everything,
you have taught me everything that i know,
i will never be able to repay you,
or ever let you go.
you have to realize, if something ever happened to you,
i seriously would cry,
i wouldn't ever be able to live without you,
so i would definently die.
so please never leave me,
because i love you so,
you are my best friend,
i will never let you go.