Piano song

can't you see what being in love with you does to me
i've been up all night trying to figure out a way to let you know:

you are the best that i'll ever have
you are the best that i'll ever have
you are the best that i'll ever have
and i'll never, i'll never, i'll never, let you go

weak in the knees and i can't speak
i've been like this the whole week
but it's so much fun, it's so much fun
to be in love with you