I think this is pretty close to right.  I just tabbed it out listening to it on a 
so there might be some things that i couldn't pick up that you can hear better on a good
sound but it sounds good playing along with the computer.  If anybody finds any place I
messed up though feel free to tell me.

Regular Tuning
Capo on 7th fret

chords used
Am   x0221x
G    32000x
C    x3201x or 33201x
Em   02200x
F    13321x
If you are just strumming the chords I think it sounds better if you mute the smallest 
the whole time

Intro and verses

  Am     G     C                  Am     G     C
-----------------------------------------------------------------|
-----1-0-----0-1-----1-------1-------1-0-----0-1-----1-------1---|
-----2-0-----0-0-----0-------0-------2-0-----0-0-----0-------0---|
---2-------0-------2---2---2---2---2-------0-------2---2---2---2-|
-0---------------3-------3-------0---------------3-------3-------|
---------3-------------------------------3-----------------------|

  Am     G       Am       Em      F      G     C
---------------------------------------------------------------|
-----1-0-----0-1-----1-0-----0-1-----1-0-----0-1-----1-------1-|
-----2-0-----0-0-----2---------0-----2-0-----0-0-----0-------0-|
---2-------0-------2---2-----2-------------0-------2---2---2---|
-0---------------0---------2-------3-------------3-------3-----|
---------3---------------0-------1-------3---------------------|

Chorus
I just strum the chorus, you can pick it out if you want to though, I think it is pretty 
to the same pattern as the rest of the song, but the chords are as follows:

G   C   F   G   C   F   Em   Am   F   Em   Am   F

Thats pretty much how the whole song goes, hope I was half way close on it.
Here's the lyrics too in case you were wondering.

It's my heart you're stealing
It's my heart you take
It's my heart you're dealing with
And it's my heart you'll break

It's my heart you're taking
It's breaking bit by bit
It's my heart you're dealing with
But you don't know about it

If you'd feel like I feel
And if you'd know what I know
I don't think you'd ever play me
I know you'd never play me