Song is in the key of Cm (from what I hear)

 Cm: x35543
 Bb: x13331
 Ab: 466544
 Fm: 133111
 Gb: 244322
 Gm: 355333

Cm Bb Ab Fm  -  Intro

Letting you go...(here's somebody...)
Letting you go...(here's somebody...)

Cm Cm Ab Fm  -  Rap

Yo I got this, yeah
still thinking about this thing alot
you got me shaken up
(Please tell me there's a way)
And it got my head just spinnin' round round round round
(Please tell me there's a way)
Don't wanna take a fall
It's best to break it up
It's gonna be better for you, move on
(Please tell me there's a way)
Uh huh we break it break it
Or thought we make it make it
And now we cover it up

        Cm                    Fm
Girl I swear kimi no koto wo ichibyou demo
  Cm                 Ab
kanashimasenai yakusoku
  Cm                  Fm
mamoru tame ni wa mo moukoreshika
 Cm                  Ab
erabu michi wa nai kara
     Gb                         Ab
Baby aishita bun dake kizutsuketeshimau
              Gb                 Fm   Cm
and I've got nothing, nothing to say

CHORUS

           Bb             Ab
Tell me goodbye, tell me goodbye
  Bb           Cm
dakishimeta te wo
            Bb              Ab
Tell me goodbye, tell me goodbye
 Bb
hanasou                
      Ab          Bb        Cm        Fm     Cm
boku wo wasureru koto ni jiyuu ni naru nara Baby 
          Bb                Ab      Bb
Tell me goodbye, tell me goodbye

        Cm                      Fm
Girl you know kimi ga egao wo naku shitaku hodo
    Cm                  Ab
boku wa jibun mo semeru yo
     Cm                Fm
nego semeru kotoba mo hikari sae mo
  Cm            Ab
nanimokamo miushinau
      Gb                       Ab
Baby kono kuchibiru ga hanareta shunkan
                  Gb                 Fm   Cm
I'll never find better, better than you

chorus

Cm Cm Ab Fm  -  Rap

Yo and it's so, so
Sad it just ain't happening
Wish it could be better
Sorry to scrapping
But I just can't let ya
Shouldn't be less than happy
I said look at me
I couldn't live with myself seeing you lacking
The things you deserve
Baby you was a part?
Must believe that it hurts
that lead this world
I feel the aching through my body
it just takes a bigger part of me
to be let you go
I wish that weren't so...

Cm        Bb              Cm           Bb Ab Gm
kimi no koe setsunaku fade away...away-ay-ay-ay
 Cm         Bb            Cm         Bb Ab Gm
kaze ni kakikesareteyuku stay...stay-ay-ay-ay
  Cm           Bb         Ab           Bb              Ab
kore ijou wa I can't take it, sono namida don't cry for me
           Bb                  Cm    Bb Ab Gm
kimi no tame never look back again

chorus