It's like this... Lily hates James' guts because he thinks he's so perfect but secretly she has the worlds biggest crush on Potter. problem he doesnt know she exsists.
Lily thought life was perfect, she was dating James Potter, and Was Head Girl. One day the unthinkable happens, james Leaves her. She begins to think Life will never be the same til he reappears one day in her life again.
Lily hates life, to put it simply she has been a rebel since she could remember, and has felt that life has dealt with her unfairly. Her best friend Jared, shows her the light one afternoon.. and her views change even more when shes accepted to Hogwarts..