General outline of how I play it - freestyle a bit and play around.
I capo on 3 cos I can't sing that low...

INTRO/VERSE
E----------0-1-0---0-------3-------------------------------- | 
B-------1--------1---------3--------0--------0-------------- | 
G-------0----2-0-------------0--------0-----------------0--- | 
D----2----------------------------2--------0---------2------ | 
A-0----------------------2------3---------------2-------0- | 
E----------------------3-----------------------0------------ | 
   

E-------------------------------- | 
B--1-1p0-----------0-----0h1p0--- | 
G--2-2p0-------------2-2-------0- | 
D---------2-------2--2-2--------- | 
A---------------2---------------- | 
E------------0------------------- | 


Am7               F C   G        C FILL
When he drops you off I will not say
Em      Am          Em            Am
Who was that who so quickly drove away
Am7               F C          G             C FILL
The things you've done and the places you've been
Em              Am                  Em           Am 
When I open the door for you I will not let them in
Am7                 F          C      G      C FILL
As long as you come back to me I will never ask
Em             Am     Em              Am
For you I will be the man in the iron mask

BRIDGE FILL

Am7          F        C      G        C FILL     
You said you loved me and it broke my heart
Em                Am       Em             Am
I was always your prisoner right from the start
Am7                      F     C     G               C FILL
The nights you spend without me this house is like a dungeon
Em           Am        Em         Am
And you only return to torture me more
Am7                F       C  G        C FILL
You must have your reasons, I will not ask
Em             Am     Em              Am
For you I will be the man in the iron mask

PLAY AROUND ON INTRO - FINISHES ON A MAJOR / A7


C FILL:

E----------------------------- | 
B-----0--------0-------------- | 
G-------0-----------------0--- | 
D---2--------0---------2------ | 
A-3---------------2-------0- | 
E----------------0------------ | 

BRIDGE FILL:

E---------------------0----------          --0--
B---------------------0----------          --0--
G-----------0---------0---------- X 2 THEN --1-- ( E7 )
D---------2--------0--2----------          --0--
A-0--2--3--------2----2--2-2-2-2-          --2--
E--------------3------0--0-0-0-0-          --0--