If you want to play a easier version you can click transpose -2 and put a capo on 
second fret and the chords are simple (A, Bm, D, Em and G)

Intro: E B Dbm A

    E                     B      Dbm                A
You lied to me, and now I see, a liar is all you?ll ever be
    E                B                  Dbm            A
You let me down, you fooled around, and now you get to watch me now

              E                   B
I?m gonna get even, wait and see, you?re gonna be so sorry
       F#m                               A 
When I get thought with you, you wish you?d never had been born
              E                                  B
I?m gonna get even, gonna mess you up, there?s a whole lot of boys 
                        F#m                            A
Out there to love, you?ll never have another chance to break my heart no more
              Dbm                 E
I?m gonna get even, I?m gonna get even 

           E         B                       Dbm              A
I?ll never kiss your lips again, cause now I know where they have been
          E                    B                           Dbm       
Oooooh, I got big plans, for my revenge, but you won?t know how, 
         A
You won?t know when

              E                   B
I?m gonna get even, wait and see, you?re gonna be so sorry
       F#m                               A 
When I get thought with you, you wish you?d never had been born
              E                   B       Dbm    A
I?m gonna get even, I?m gonna get even
              E                                  B
I?m gonna get even, gonna mess you up, there?s a whole lot of boys 
                        F#m                            A
Out there to love, you?ll never have another chance to break my heart no more
              Dbm                 E
I?m gonna get even, I?m gonna get even 
              B                   Dbm      A    E    B    Dbm    A
I?m gonna get even, I?m gonna get even, 

    E                     B      Dbm                A
You lied to me, and now I see, a liar is all you?ll ever be