Been looking for this song for ages so I though I though I would give a go in figuring 
out the chords. They sound alright but feel free to make changes enjoy :)

D
How can I go on
       F#m
When I know I gave it all
                  G   A
Have I given too much
D
Something inside your heart
   F#m
Is pushing me aside
                   G       A
And it seems so un-you baby
                    F#m  Bm
But it's so hard on me
               Em              A
What is it I'm seeing in your eyes
                    Em                G A
The story that I'm reading says goodbye

               G              A
Tell me baby where did we go wrong
           F#m            Bm
How did we lose a love so strong
            G                   A
What can I say to make things right
          F#m                Bm
Baby hold on, don't leave tonight
                   G
There's no reason why
                         A
This part of us should die
              D
Don't say goodbye

D
Searching for answers
              F#m
But they're oh so hard to find
                        G        A
'Cause I'm still loving you baby
                         F#m Bm
Oh, are you still loving me
               Em                  A
Baby don't you turn and close the door
                Em          G
Is it you don't love me anymore

A            G                A
Tell me baby where did we go wrong
           F#m             Bm
How did we lose a love so strong
            G                 A
What can I say to make things right
          F#m                Bm
Baby hold on, don't leave tonight
                   G
There's no reason why
                        A
This part of us should die
              F#m
Don't say goodbye
               Bm       F#m
Don't leave me now all alone
                Bm
Don't bring me down
                     G    A
'Cause I'm not that strong
            G               A A#
I need your love to carry on


Half step up or you can play original

              G#             A#
Tell me baby where did we go wrong
           Gm             Cm
How did we lose a love so strong
           G#                  A#
What can I say to make things right
          Gm                 Cm
Baby hold on, don't leave tonight
                   G#
There's no reason why
                       A#
This part of us should die

Don't say goodbye

G#                  A#
where did we go wrong
           Gm             Cm
How did we lose a love so strong
           G#                  A#
What can I say to make things right
          Gm                 Cm
Baby hold on, don't leave tonight
                  G#
There's no reason why
                       A#
This part of us should die
              D#
Don't say goodbye
                 G#
There's no reason why
                       A#
This part of us should die
              D#
Don't say goodbye