The whole song goes as such: 

Fm D Bm C#m A 

(The first three chords are each played for two beats, and the last two are played 
for one beat each.) 

Fm                  D       Bm           C#m  A 
The mirror's image tells me it's home time 
Fm                  D       Bm                      C#m    A 
But I'm not finished 'cause you're not by my side
Fm             D                                    Bm           C#m             A 
And as I arrived I thought I saw you leaving, carrying your shoes
Fm             D                                   Bm               C#m             A 
Decided that once again I was just dreaming of bumping into you

Fm               D                    Bm 
          Now it's three in the morning 
             C#m           A              Fm 
And I'm trying to change your mind
(Fm)          D                   Bm 
Left you multiple missed calls
(Bm)                   C#m       A 
And to my message, you reply

Fm         D                                                  Bm       C#m  A 
         Why'd you only call me when you're high? 
Fm         D                                                  Bm       C#m  A 
High, why'd you only call me when you're high?

Somewhere darker, talking the same shite
I need a partner (high), well, are you out tonight?
It's harder and harder to get you to listen, more I get through the gears
Incapable of making alright decisons and having bad ideas

Now it's three in the morning
And I'm trying to change your mind
Left you multiple missed calls
And to my message, you reply (message, you reply)

Why'd you only call me when you're high?
(Why'd you only call me when you're)
High, why'd you only call me when you're high?

And I can't see you here, wondering where I might
It sorta feels like I'm running out of time
I haven't found what I was hoping to find

You said you gotta be up in the morning, gonna have an early night
And you're starting to bore me, baby, why'd you only call me when you're high?

Why'd you only ever phone me when you're high?
Why'd you only ever phone me when you're high?
Why'd you only ever phone me when you're high?
Why'd you only ever phone me when you're
High?