From http://www.oldmanriver.ch/30_repertoire/30w20_who's_sorry_now_d.htm

WHO'S SORRY NOW?
Ted Snyder & Bert Kalmar/Harr Ruby (1923)

You smiled when we parted. It hurt me somehow.
I thought there was nothing worthwhile.
The tables are turning and you're crying now,
While I am just learning to smile.
Although I forgive you, I cannot forget
How you shattered all my ideals.
You smiled when I told you that you would regret,
And now you know just how it feels.

CHORUS: Who's sorry now?
Who's sorry now?
Whose heart is aching for breaking each vow?
Who's sad and blue?
Who's crying too?
Just like I cried over you.
Right to the end,
Just like a friend,
I tried to warn you somehow.
You had your way,
Now you must pay;
I'm glad that you're sorry now.