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

AYou (x02220@1)don't trust me to sit on your bed
APut (x02220@1)me on a chair in the corner instead
EYou (022100@1)don't trust me
E (022100@1)                    A (x02220@1)You don't trust me at all

AOnly (x02220@1)want me for my lungs
A (x02220@1)                                EOnly (022100@1)want me for the songs I write about you
E (022100@1)               AAbout (x02220@1)how I like you

EYou (022100@1)don't trust me to sit on your bed
D (xx0232@1)                                  APut (x02220@1)me on a chair in the corner instead

AI'm (x02220@1)just hoping you slip up
AMiss (x02220@1)a step
AStop (x02220@1)being sensible
A (x02220@1)   EAnd (022100@1)fall
E (022100@1)      AInto (x02220@1)my arms

EDon't (022100@1)you wanna have that morning again
D (xx0232@1)                                           AWanna (x02220@1)be your lover and try not to be your friend

EA

D (xx0232@1)                                   AYou're (x02220@1)so sweet and you keep me that way
             EMessin' (022100@1)my head, messin' my head
DYou're (xx0232@1)so sweet and you keep me that way
A (x02220@1)                EMessin' (022100@1)my head, messin' my head
DI (xx0232@1)know that you've been playin' me
A (x02220@1)                EMessin' (022100@1)my head, messin' my head
DI (xx0232@1)know that you've been playin' me
A (x02220@1)                EMessin' (022100@1)my head, messin' my head

EYou (022100@1)don't trust me to sit on your bed
D (xx0232@1)                                  APut (x02220@1)me on a chair in the corner instead

EDon't (022100@1)you wanna have that morning again
D (xx0232@1)                                           AWanna (x02220@1)be your lover and try not to be your friend

D (xx0232@1)                                   AYou're (x02220@1)so sweet and you keep me that way
             EMessin' (022100@1)my head, messin' my head
DYou're (xx0232@1)so sweet and you keep me that way
A (x02220@1)                EMessin' (022100@1)my head, messin' my head
DI (xx0232@1)know that you've been playin' me
A (x02220@1)                EMessin' (022100@1)my head, messin' my head
DI (xx0232@1)know that you've been playin' me
A (x02220@1)                EMessin' (022100@1)my head, messin' my head

EYou (022100@1)don't trust me to sit on your bed
D (xx0232@1)                                  APut (x02220@1)me on a chair in the corner instead

EA EA EA EA