Listen to the song for strumming patterns; it?s fairly simple when you hear it.  
Although there are 2 guitars they play the same thing the whole time (other then the verse).

INTRO / OUTRO
        E                         B      D#m     F#
|-------7-----7h9p7---------------7-------6------(b9)----12--12--11--11h12-------|
|-------(b9)------------(b9)7---------7-------7-----11-----x---x---x---x--x--------|
|-------(b9)-----------------(b9)-----7h8-----8-----11-----x---x---x---x--x--------|    1X
|-------(b9)------------------------7h(b9)----8-----11-----------------------------|
|-------7-------------------------7h(b9)----6------(b9)----------------------------|
|-------7-------------------------7-------6------(b9)----------------------------|
 
        E                         B      D#m    F#
|-------7-----7h9p7---11---7------7-------6------(b9)-----|
|-------(b9)------------(b9)----------7-------7-----11------|
|-------(b9)------------------------7h8-----8-----11------|   1X
|-------(b9)------------------------7h(b9)----8-----11------|
|-------7-------------------------7h(b9)----6------(b9)-----|
|-------7-------------------------7-------6------(b9)-----|


VERSE

Both guitars play at the same time in the studio version, 
but in live versions they usually don?t play the guitar 2 part because Will is on the drums.

Guitar 1
         B       E
|------7------7------|
|------7------(b9)-----|
|------8------(b9)-----|        12X
|------(b9)-----(b9)-----|
|------(b9)-----7------|
|------7------7------|

Guitar 2
         B
|------7--------------------------------------------|
|------7--------------------------------------------|
|------8-----------------------------(b9)-----(b9)------|        12X
|------(b9)----------------9h11--(b9)(b9)(b9)--(b9)(b9)---------|
|------(b9)---------(b9)11------------------------------|
|------7----9h11------------------------------------|



CHORUS

These two chords are just repeated over and over again.
       F#        E 
|------(b9)--------7------|
|------11--------(b9)-----|
|------11--------(b9)-----|      4X
|------11--------(b9)-----|
|------(b9)--------7------|
|------(b9)--------7------|




BRIDGE

During the bridge the strumming switches up some times but it basically stays the same.
       B       E       F#        F#
|------7-------7-------(b9)--------(b9)-------|
|------7-------(b9)------11-------11--------|
|------8-------(b9)------11-------11--------|      18X
|------(b9)------(b9)------11-------11--------|
|------(b9)------7-------(b9)--------(b9)-------|
|------7-------7-------(b9)--------(b9)-------|

Song layout

Intro 
Verse 
Chorus  
Verse
Chorus
Verse- Play only 4X not 12X right before the bridge
Bridge
Outro