Unbreakable vow

Way back when i was little
i heard my brother say
you can give pearls and books and clothes
but not your heart away

but now i did it anyway
and i know you're here to stay
i couldn't have flown above the clouds higher
my heart a-blaze with fire

and here we lay
all night and day
I'm wrapped around your arm
where i come to no harm

let's stay like this always now
i promise i won't break this vow