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 Bb
I need your love to carry on


Half step up or you can play original

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

Don't say goodbye

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