From boyfriend to best friend

Everything changed now,
Still can't explain it,
How things happened so fast,
Because of a simple stupid conversation they found,
we said we would always be together,
and that nothing could ever break us apart,
but now all i see is shattered pieces of my heart,
now all i am to you is a best friend,
the one you used to love,
the one you wanted so bad,
but that you could never have,
because of the miles apart,
but still we could of seen each other,
this summer,
but its over!