I don't think this is the way they play it, but it sounds very similar and it's 
quite simple. Listen to the song for the strumming patterns.
Hope this helps!
Big Deal: http://www.myspace.com/weareabigdeal

Intro: A

A
You don't trust me to sit on your bed
A
Put me on a chair in the corner instead
E
You don't trust me
E                      A 
You don't trust me at all


A
Only want me for my lungs
A                                  E
Only want me for the songs I write about you
E                 A
About how I like you


E
You don't trust me to sit on your bed
D                                    A
Put me on a chair in the corner instead


A
I'm just hoping you slip up
A
Miss a step
A
Stop being sensible
A     E
And fall
E        A
Into my arms


E
Don't you wanna have that morning again
D                                             A
Wanna be your lover and try not to be your friend

E A


D                                     A
You're so sweet and you keep me that way
             E
Messin' my head, messin' my head
D
You're so sweet and you keep me that way
A                  E
Messin' my head, messin' my head
D
I know that you've been playin' me
A                  E
Messin' my head, messin' my head
D
I know that you've been playin' me
A                  E
Messin' my head, messin' my head


E
You don't trust me to sit on your bed
D                                    A
Put me on a chair in the corner instead

E
Don't you wanna have that morning again
D                                             A
Wanna be your lover and try not to be your friend


D                                     A
You're so sweet and you keep me that way
             E
Messin' my head, messin' my head
D
You're so sweet and you keep me that way
A                  E
Messin' my head, messin' my head
D
I know that you've been playin' me
A                  E
Messin' my head, messin' my head
D
I know that you've been playin' me
A                  E
Messin' my head, messin' my head


E
You don't trust me to sit on your bed
D                                    A
Put me on a chair in the corner instead

E A E A E A E A