Circlenot Astraight

The answer comes as a question mark
 And I can't be bothered to remark
 What did I know but wasn't ready to say?
 I am your sister
 Don't pretend I don't know your tricks
 You were my only friend
 I never thought that we would end up this way
 My addictions make me hate
 But my afflictions make me kind
 I'm a circle, not a straight line
 A straight line, a straight line
 Then we get swallowed by the abyss
 What is the meaning of all of this?
 You might act like you'll never die
 But you're getting old
 Don't act like you don't love the sting
 I know you're capable of anything
 You were the most convincing lie I ever told
 My afflictions make me hate
 But my addictions make me kind
 I'm a circle, not a straight line
 A straight line, a straight line