From the sheet music at Indiana University Sheet Music Collections:

WHO'S SORRY NOW?
Words, Bert Kalmar and Harry Ruby. Music, Ted Snyder.
New York: Waterson, Berlin & Snyder Co., © 1923.

1. 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.

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.

2. 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.