Intro (strum once for each chord until you get comfortable. Also, listen 
to the song to get a feel for how it should sound) 

D D D D6 D Dsus4 D D D G G D (2x)

D                                     G               D
I'm old enough to know that I'm too young to know a thing. 
D                            G            D               G
I see what I see, and in you I see everything I'll ever need.
D                              G              D
I've met a lot of faces and I know a lot of names
D                                  G                 D
But everyone I've come across has all been just the same,
              G                 D
But that all changed. That all changed.

D                         G
Under the downtown neon lights
D                          G
That's where you caught my eye
D                     G
You got me all worked up
         D                  G
I ain't leavin' without your love
D                G
It's obvious we both know
D                 G
This don't end tomorrow
D                   G
Tonight ain't long enough
         D                  G
I ain't leavin' without your love
         D                  G
I ain't leavin' without your love

D D D D6 D Dsus4 D D D G G D 

D                            G              D
Jukebox dies, closing time, take me by the hand.
D                       G              D    G
Last call, last song, give me one more da-a-a-nce.

D                         G
Under the downtown neon lights
D                          G
That's where you caught my eye
D                     G
You got me all worked up
         D                  G
I ain't leavin' without your love
D                G
It's obvious we both know
D                 G
This don't end tomorrow
D                   G
Tonight ain't long enough
         D                  G
I ain't leavin' without your love
         D                  G
I ain't leavin' without your love

Instrumental D G D G D G G D (2x) <-- This part is very simplified 
and a second guitar is what gives this part of the song the complexity it has.

(No chords)
Under the downtown neon lights
(No chords)
That's where you caught my eye
(No chords)
You got me all worked up

           D                G
I ain't leavin' without your love
D                G
It's obvious we both know
D                 G
This don't end tomorrow
D                   G
Tonight ain't long enough
         D                  G
I ain't leavin' without your love
       D                G
No, tonight ain't long enough
         D                  G
I ain't leavin' without your love

*Acapella for the rest of the song*
Tonight ain't long enough
I ain't leavin' without your love
I ain't leavin' without your love