Capo 2 

The 1st part is just the keyboards, but you could play along with it with the following chords.

Verse 1:

So what if I came clean, I told you all you mean to me
So what if I meant every word I said, baby don't let it go to your head
G5                                E5
So what if I write your name because you're always on my brain
C5                              A5
In a heart I paint it crimson red, baby don't let it go to your head
E5 B5  A5                            E5 B5          C5             D5
      Don't be getting any big ideas       Let me make it clear

Chorus:
E5           G5
Just cause I can't go on
D5
Just cause I die when you're gone
E5           G5                D5                           E5
Just cause I think of you in bed, don't let it go to your head
             G5
If I looked in your eyes
D5
1,2, too many times 
E5             G5              D5
and memorized every word you said, don't let it go to your head

Verse 2:
G5
So what if I want to kiss
E5
from your toes up to your lips
C5                                 A5                          E5  B5
It don't mean that you've had me yet, you're gonna be good I bet
A5                             E5  B5           C5        D5
I'm the one who's in control here      Let me make it clear

(chorus)
E5 G5   D5                                  E5  G5  D5
      ooohhhhhh don't let it go to your head     ooohhhhhhh

Bridge:

I had a porcelain doll

I held on to it so tightly, but when it broke 
                                          E5                          G5
I swore I'd never hold onto something so tightly again, don't let it go to your head  
D5
oohhh no ooh no noo

(no chords)

Just cause I can't go on

Just cause I die when you're gone

Just cause I think of you in bed, don't let it go to your head

guitar solo or play chorus chords

(chorus)play chords until the end.