Noone has quite gotten this right yet. Here's my attempt.
Bb Cm7
Sometimes late at night
F D#/Bb Bb Cm/Bb Bb
I lie awake and watch her sleeping
F Cm7
She's lost in peaceful dreams
F D# Bb D#/Bb Bb
So I turn out the lights and lay there in the dark
Bb Cm7
And the thought crosses my mind
F D#/Bb Bb Cm/Bb Bb
If I never wake up in the morning
F Cm7 F
Would she ever doubt the way I feel
D# Bb D#/Bb Bb
About her in my heart
Bb D#
If tomorrow never comes
Bb
Will she know how much I loved her
F Cm7 F
Did I try in every way to show her every day
D# Bb
That she's my only one
Cm7 Bb/D D#
And if my time on earth were through
F Gm7 Dm7
And she must face this world without me
Gm Cm7
Is the love I gave her in the past
F
Gonna be enough to last
Bb F/Bb D#/Bb
If tomorrow never comes
Bb Cm7
'Cause I've lost love once in my life
F D#/Bb Bb Cm/Bb Bb
Who never knew how much I loved them
F Cm7
Now I live with the regret
F D# Bb D#/Bb Bb
That my true feelings for them never were revealed
Bb Cm7
So I made a promise to myself
F D#/Bb Bb Cm/Bb Bb
To say each day how much she means to me
F Cm7
And avoid that circumstance
F D# Bb D#/Bb Bb
Where there's no second chance to tell her how I feel
Bb Cm7
So tell that someone that you love
F
Just what you`re thinking of
D# Bb/D Cm7 Bb
If tomorrow never comes