Could it be this one by Johnny Mathis:

CHANCES ARE
Johnny Mathis
Words by Al Stillman and Music by Robert Allen

Peak position # 1 in 1957


Chances are 'cause I wear a silly grin
The moment you come into view
Chances are you think that I'm in love with you

Just because my composure sort of slips
The moment that your lips meet mine
Chances are you think my heart's your Valentine

        BRIDGE
        In the magic of moonlight when I sigh, "Hold me close, dear"
        Chances are you believe the stars that fill the skies are in my eyes

Guess you feel you'll always be the one and only one for me
And if you think you could
Well, chances are your chances are awfully good


        Chances are you believe the stars that fill the skies are in my eyes

Guess you feel you'll always be the one and only one for me
And if you think you could
Well, chances are your chances are awfully good

The chances are your chances are      awfully good