Chorus
You can't love him
For he's already mine
And I won't let you
Two is too much and I am his one

I fell in love with an angel
He will just do anything for me
So girl I understand why you're trying
But he only loves one and that'll be me

Chorus
You can't love him
For he's already mine
And I won't let you
Guess you didn't see he only needs me
[ Lyrics from: http://www.lyricsfreak.com/k/krezip/thatll+be+me_20316821.html ]
You can't pretend that it's not true
I understand that girl so it's ok
I listened to your story now go, go, go
Cause we would like to have some time of our own

Chorus
You can't love him
For he's already mine
And I won't let you
You've had your chance and now it is mine

Chorus
You can't love him
For he's already mine
And I won't let you
He'll just have one and that'll be me