Key to my heart

You say I don't deserve you
cuz you weren't the best you could be,
but in my heart you were the one
to hold the only key,
to me you were the best
because you're the only one,
when we were together
we had so much fun,
I can't believe it's over
it keeps replaying in my mind,
what once was so great
is now so hard to find,
I thought we would be together
for the longest time
cuz looking back at our relationship
there wasn't a break-up sign,
well now that it's over
I just want you to know,
you still hold the key to my heart,
so please don't ever let go