Slight correction to the tab here. (The Bm cord was left out mostly)  The song is
played with a capo on the first fret if you want to play it like the record.  But it's easier 
sing if you don't.  (And most of us aren't Cassidy)

D (xx0232@1)                   ABm
Heard you talk about leaving
D (xx0232@1)                   ABm      DHeard (xx0232@1)you talk about leaving before
D (xx0232@1)                   Bm (x24432@1)        GHeard (320003@1)you talk about giving up on me.

D (xx0232@1)                   ABm
Heard you talk about changing
D (xx0232@1)                      ABm              DBut (xx0232@1)talk is cheap and I've heard it all before
D (xx0232@1)                  BmUsed (x24432@1)to be that I'd fall apart
     G (320003@1)               ABut (x02220@1)that don't work no more

     F#m (244222@1)                Bm'Cuz (x24432@1)you can't leave half way
    F#m (244222@1)            GA
And I can't let you stay

D (xx0232@1)                 ATake (x02220@1)your promise take your pain
Bm (x24432@1)               GTake (320003@1)your restless heart
       D (xx0232@1)            A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back
  D (xx0232@1)                          A'Cuz (x02220@1)in my heart you've been gone so long
       Bm (x24432@1)                Gthat (320003@1)I won't miss you that bad
        D (xx0232@1)             A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back

D (xx0232@1)                         ABm
So you ask me why I'm not crying
D (xx0232@1)           ABm       DI (xx0232@1)did all my crying before
        D (xx0232@1)         BmI (x24432@1)took off my pity party dress and
          G (320003@1)      AI (x02220@1)don't dance no more

F#m (244222@1)                BmI (x24432@1)don't need someone else
F#m (244222@1)             GA
To make me feel myself

D (xx0232@1)                ATake (x02220@1)your promise take your pain
Bm (x24432@1)                  GTake (320003@1)your restless heart
       D (xx0232@1)             A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back
  D (xx0232@1)                         A'Cuz (x02220@1)in my heart you've been gone so long
Bm (x24432@1)                       Gthat (320003@1)I won't miss you that bad
        D (xx0232@1)            A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back
        D (xx0232@1)            A (x02220@1)             Em (022000@1)AIf (x02220@1)you go, go all the way, don't look back
           EmA             EmA
Don't look back, don't look back

D (xx0232@1)                ATake (x02220@1)your promise take your pain
Bm (x24432@1)                  GTake (320003@1)your restless heart
        D (xx0232@1)            A (x02220@1)              GIf (320003@1)you go, go all the way, don't look back
 D (xx0232@1)                           A'Cuz (x02220@1)in my heart you've been gone so long
        Bm (x24432@1)                Gthat (320003@1)I won't miss you that bad
        D (xx0232@1)            A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back
        D (xx0232@1)            A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back
        D (xx0232@1)            A (x02220@1)             GIf (320003@1)you go, go all the way, don't look back