I feel chord inversions really make or break this song. So here's how I play it.

Tempo around 47 bpm

[Intro]

RH - D drones quarter notes throughout
LH - Bm5 - G5 - D5 - A5 (+ add4 with C# in RH) 


[Verse]

All bass notes (LH) are in root position, but some chords (RH) are inverted.

D (root)
F#m (2nd inversion: C# - F# - A)
G (2nd inversion: B - D - G) +optional add9 in 3rd measure
D (root)
A (1st inversion: C# - E - A)


[Chorus]

Similar to the intro, but full chords.

Bm (root)
G (2nd inversion: B - D - G)
D (root)
A (1st inversion: C# - E - A)




           
Say something,

            
 I'm giving up

                           
 on you
         
I'll be the on

              
e, if you want

                            
 me to
         
Anywhere I wou

              
ld've followed

                            
 you
           
Say something,

            
 I'm giving up

                            
 on you


             
And I am feeli

       
ng so small
       
It was over my

 head
              
I know nothing

                     
 at all


             
And I will stu

         
mble and fall
           
I'm still lear

ning to love
              
Just starting 

                         
to crawl


            
Say something,

             
 I'm giving up

                           
 on you
            
I'm sorry that

             
 I couldn't ge

                            
t to you
           
Anywhere I wou

              
ld've followed

                       
 you
            
Say something,

             
 I'm giving up

                          
 on you


             
And I will swa

       
llow my pride
            
You're the one

 that I love
              
And I'm saying

                        
 goodbye


            
Say something,

             
 I'm giving up

                         
 on you
            
And I'm sorry 

             
that I couldn'

                            
t get to you
           
And anywhere I

              
 would've foll

             
owed you (Oh-o

  
h-oh-oh)
            
Say something,

             
 I'm giving up

                           
 on you


           
Say something,

            
 I'm giving up

                         
 on you
           
Say something.

                   
..