Decided to add a tab, my first one. Not anything magical here, just a few slight 
adjustments that made it sound better to me on an acoustic I guess.

Intro/verse
|---------------------------|
|---------3-3-3-3-3-3-3-3---|
|---9\----4-4-4-4-4-4-4-4---|
|-------x-5-5-5-5-5-5-5-5---|    x2
|---7\--x-5-5-5-5-5-5-5-5---|
|---------------------------|


|---------------------------|
|--3-3-3-3-3-3-3-3----------|
|--x-4-x-4-x-4-x-4----------|
|--5-5-5-5-5-5-5-5----------|  x2
|--3-3-3-3-3-3-3-3----------|
|---------------------------|

Chorus

basicly its just Am and C, just listen to the song and you'll get it. I like to play 
something like this, but just play around with it and you'll find how you want to play it.
|------------------------------------------|
|---------1-----1-----1-------1-----1------|
|-----------2-----2-------------0-----0----|
|-------2-----------2-------2-----------2--|  x2,
|-3-2-0-------0---------2-3-------3--------|
|------------------------------------------|

Intro/verse
Chorus

Interlude (this sounded good to me):

|-3---2---3---------3---3-|
|-3---3---3---------3---3-|
|-0---2---0---------0---0-|
|-0---0---0---------2---2-|
|-2---x---2---------2---3-|
|-3---2---0---------0-----|

change-up(listen to the song):

|-3-3-3-3-2-2-2-2-3-3-3-3-2-2-3-3-0-0-0-0-3-3-3-3-|
|-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-|
|-0-0-0-0-2-2-2-2-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
|-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-2-2-2-2-2-2-2-2-|
|-2-2-2-2-x-x-x-x-2-2-2-2-2-2-2-2-2-2-2-2-3-3-3-3-|
|-3-3-3-3-2-2-2-2-3-3-3-3-3-3-3-3-0-0-0-0---------|

(Note: play 2nd fret only on the a-string only if you can manage, if not just mute it).

There you have it, again listen to the song and you'll do great.