It happened to me too. The girl i used (or still (i really don't know myself either if i still feel something for her)) changed into something i don't know, someone i never knew, someone she would never be, idk whats gotten into her... she was pure and smart and pretty and kind. But she started blinding herself, changed her beautiful hair-color, closed her mind, became cold and distant, and has an insuportable attitude... but i've accepted that in her cuz ... i loved her (or still love). I really regret what she did... she ruined herself if i might say.