It sounds to me like a person tired of hiding her true feelings. She tries to pretend they are just easy games at first and she doesn't care at all ("You say they never hurt you/ No consequence, I'm happy/We're much too far above it all" and "Thinking of all the hearts I'd happily break/ It's cruel I know/ At least they tell me so/ Well someone lock me up and throw away the key/ Because I'm not ashamed, oh no"). But then the guilt and the sadness of never being true start to become a burden ("But oh no, that's not true/ These wicked pastimes take their toll/ These tyrant vices break your soul/ Deliver me from all I am/ And all I never want to be" and "Share your sympathy and weep for me/ Oh, willow, heal the hearts I've broken/ Make me pure and start my song anew").