cold-blooded woman

I also had pretended to be a  cold-blooded woman by which I  thought he could forget me sooner. While listening the song by Hebe, it occurs to me that maybe I have done the wrong thing to him. Why you have to try everything  to make him hate you, he might understand if you tell what you thought and have experienced. If there was any reason, that must be that I didn't  trust him, compared with explaining to him, l thought pretending to be a cold-blooded woman is  a efforts-saving way.

What  a  selfish person I am.