Can’t Smile Without You 
Barry Manilow (#3 in 1978), The Carpenters

You know
    I Can't Smile Without You,
    I Can't Smile Without You,
    I can't laugh and I can't sing,
    I'm findin' it hard to do anything.
    You see, I feel sad when you're sad,
    I feel glad when you're glad,
    If You only knew what I'm going through,
    I just can’t Smile Without You.

You came along just like a song and brightened my day,
Who'd've believe that you were part of a dream
Now it all seems light years away.
And now
Now some people say happiness takes so very long to find.
Well I'm finding it hard leaving your love behind me.