A nice, simple song. The chords are just the same throughout.

Intro: Just hold E

1st verse

E                           A
  I guess I got just what I wanted
E                        A
  And all I wanted was a place
E                           A
  When you passed me in the hallway
E                         A
  On the way to your next class

Chorus:

C#m
  I'm fucking up
B
  I'm fucking up
C#m              A
  I'm fucking up everything

Guess I got just what I wanted
We're both alone at my dad's house
And now's my chance to finally kiss you
But I got drunk and I passed out

I'm fucking up, I'm fucking up, I'm fucking up everything

Guess I got just what I wanted
A pretty girl to live with me
Split the rent right down the middle
And all I wanna do is leave

I'm fucking up, I'm fucking up, I'm fucking up everything

Outro: Same chords as the chorus

If you want to play that cute keyboard part during the verse on the guitar, it's just 
simple line on the high e string:

e--4--2-4--7--4--2-4-2-4------|

Listen to the song for the timing.

Aaaaaand...that's it. Enjoy!

Official website: http://sadcastle.com/