How could the one?

How could the one I gave my heart to, hurt my heart so bad?
How could the one that makes me happy, make me feel so sad?
      Please do tell me for I don't understand
How could the one I gave my world to, break my world apart?
How could the one I love, tell me so many lies?
      Please do tell me for I can't comprehend
How could the one who makes me feel alive, make me feel so dead?
How could the one I love, cause these voices in my head?
      Please explain, make me understand
How could the one make me feel so cold?
How could the one, not be the one I want to hold?
      I still don't understand
How could the one I love, slowly turn to hate?
How could the on I hate, still hold my heart today?
      I will never understand
          How could it end so bad?