You're part of my heart, And now that you're gone, the stars refuse to shine, Oh how could they glow when all of them know That you're no longer mine. You're part of my heart, And I won't believe that you've forgotten me, Those nights in the lane, your love was so plain, You can't ignore my plea. My world is filled with loneliness Now that you've said we're through, I'm sure that we were meant to be, But how can I prove it to you? You're part of my heart, My love will go on until eternity, You reign in my soul beyond my control, 'cause you're part of me.
https://primoaccordo.net/frank-sinatra/youre-part-of-my-heart.htm