There are a lot of versions of this song out there with incorrect chords and 
voicings but I think this arrangement sounds pretty good

btw--The  plays well like this: 

  |---- |-----
0 |---- |-----
  |-1-- |-----
  |---- |--2--
x |---- |-----
  |---- |-----

 |---- |---- |
 |---- |---- |
 |---- |---- |
 |---- |---- |
 |---- |---- |
 |---- |--4- |

Capo 3

[Verse]
            
I know I can't

              
 take one more

           
 step towards 

you
             
Cause all that

              
's waiting is 

            
regret
            
And don't you 

              
know I'm not y

            
our ghost anym

ore
             
You lost the l

              
ove I loved th

            
e most
            
I learned to l

                 
ive half alive
            
And now you wa

            
nt me one more

    
 time

[Chorus]
             
And who do you

                  
 think you are
              
Running 'round

                  
 leaving scars
              
Collecting you

              
r jar of heart

 
s
            
And tearing lo

                  
ve apart

              
You're gonna c

                  
atch a cold
              
From the ice i

              
nside your sou

    
l
              
So don't come 

               
back for me
            
Who do you thi

                  
nk you are

[Verse 2]
I hear you're asking all around
If I am anywhere to be found
But I have grown too strong
To ever fall back in your arms

I learned to live half alive
And now you want me one more time

[Chorus]
             
And who do you

                  
 think you are
              
Running 'round

                  
 leaving scars
              
Collecting you

              
r jar of heart

 
s
            
And tearing lo

                  
ve apart

              
You're gonna c

                  
atch a cold
              
From the ice i

              
nside your sou

    
l
              
So don't come 

               
back for me
            
Who do you thi

                  
nk you are

[Bridge]
        
And it took so

          
 long just to 

    
feel alright
        
Remember how t

          
o put back the

    
 light in my e

yes
        
I wish I had m

          
issed the firs

    
t time that we

 kissed
        
Cause you brok

          
e all your pro

    
mises

And now you're

 back

You don't get 

to get me back

[Chorus]
             
And who do you

                  
 think you are
              
Running 'round

                  
 leaving scars
              
Collecting you

              
r jar of heart

 
s
            
And tearing lo

                  
ve apart

              
You're gonna c

                  
atch a cold
              
From the ice i

              
nside your sou

    
l
              
So don't come 

               
back for me
            
Who do you thi

                  
nk you are

             
And who do you

                  
 think you are
              
Running 'round

                  
 leaving scars
              
Collecting you

              
r jar of heart

 
s
            
And tearing lo

                  
ve apart

              
You're gonna c

                  
atch a cold
              
From the ice i

              
nside your sou

    
l
              
So don't come 

               
back for me
            
Who do you thi

                  
nk you are

Who do you think you are?
Who do you think you are?
Who do you think you are?