While playing the C chord in the verses,he occasionally turns it into a Cadd11 chord by 
adding his pinky on the 3rd fret of the D string,by listening to the song you can hear 
when he does it,it does not change the song in any way if you don't do it ! But it  
sounds pretty ! 
Intro : C (hammer-on and pull-off on the D string 3rd fret with your pinky) 
C                              Cmaj7      Am 
Being with you was all that I needed 
Am 
And I don't know why you were too blind to see it 
F 
Now you're gone 
Fm 
And I need you here tonight 
  C (hammer-on and pull-off on the D string 3rd fret with your pinky) 
C  G                                 Em7 
You know that I can't sleep 'cause I'm terrified 
               Am                     F 
Feels like I'm falling down really fast inside 
G                      Em7 
And I'm wishing the night away 
Am7 
These chills in the evening 
         F          Fm 
They won't go away 
  C (hammer-on and pull-off on the D string 3rd fret with your pinky) Cmaj7 
C                                    Cmaj7       Am 
And sometimes I feel like I can't go on living 
Am 
There's not much to take when you've done all the giving 
F 
Now you're gone 
Fm 
And I need you here tonight 
C (hammer-on and pull-off on the D string 3rd fret with your pinky) 
C  G                                 Em7 
You know that I can't sleep 'cause I'm terrified 
               Am                     F 
Feels like I'm falling down really fast inside 
G                      Em7 
And I'm wishing the night away 
Am7 
These chills in the evening 
          F          Fm 
They won't go away 
G                   F 
And now I need to find a way 
   Am                             G 
To stop this pain from getting stronger 
(tricky part : while playing the G  he takes his index finger,puts it on 2nd fret of the 
G string quickly and then takes it off,you can hear it in the video,again it's not an 
essential part of the song,sorry I wish I could explain this part better !) 
 F               G                          Am                 F        Fm 
And I just can't explain, I don't understand why you left me here 
G Em7 Am F 
C  G                               Em7 
Oh you know that I can't sleep 'cause I'm terrified 
               Am                     F 
Feels like I'm falling down really fast inside 
G                        Em7 
And I'm wishing the night away 
   Am7 
These chills in the evening 
              F       Fm 
They won't go away 
C Cmaj7 
Am 
Ohhhhh 
F  Fm                           C (hammer-on and pull-off on the D string 3rd fret with 
your pinkie) 
     They won't go away 
I hope this was clear enough,I know this gets a little confusing sometimes,but I tried 
my best !