Who Are You?

I been waiting for this day for a very long time
 I thought I might sleep for the rest of my life
 But now I'm wide awake and revenge is mine
 Both of us were Chosen, so far as I see
 Don't know why you seem to think you're better than me
 But now I'm gonna find the fun inside of you B
 Seems like, you think you've been living
 Your best life, so I'm feeling driven
 To test drive, the one you've been given
 While I was sleeping I dreamed about you
 And all the ways I'd make you pay
 For taking my whole life away
 All that I wanted to do
 Was find a way to make you see
 That you are just the rest, the rest of me
 I used to think there wasn't any difference between
 A killer and slayer, they both do the same thing
 But it's looking kind of different now from under your skin
 Seems like, you think you've been living
 Your best life, so I'm feeling driven
 To test drive, the one you've been given
 While I was sleeping I dreamed about you
 And all the things I'd want to say
 If I ever got the chance someday
 Thought I couldn't do what you do
 But when I'm you, it comes easily
 Maybe you're the best, the best of me
 Well I used to think I really had you all figured out
 But now I feel the weight that you carry around
 Maybe one day we'll be standing on common ground
 I thought it would mean less to me
 To feel like you're the best of me
 I've been believing secretly
 That I'm all bad, but now I see, it differently
 While you were sleeping I dreamed about you
 The things I want to say and how
 I might never get the chance to now
 I need to tell you what's true
 I know that you're the rest of me
 And you could still be the best, the best of me