Merely by chance
Very unsuspecting
You caught my heart
Unprotecting me
Now I've fallen in love with you

Just when I thought
I was free and easy
You came along to me
Soft and breezy
Now I've fallen in love with you
Woo hoo
I've fallen in love with you
[ Lyrics from: http://www.lyricsfreak.com/c/chicago/happy+man_20029916.html ]
And for the first time in my life
I know what it's like to be a happy man
Happy man
And for the first time in my life
You've given me something I can't understand
Being a happy man

Be with me now
Love me forever
Leaving you lady
Is something that I'd never do
I've fallen in love with you

All of my life it seems I have waited
Now I can say all these words I have stated are true
I've fallen in love with you
Woo hoo
Fallen in love with you Woo hoo