This might not be helpful, Yana, but I have a friend who believes that when someone steals your writing or creative work (she is a photographer), she is flattered. It doesn't remove the fact that she plagiarized and there needs to be consequences, but maybe also sit in the flattery? As Robert said ... she must really like your writing! And, why stop writing? You're better than that. Take the high road. You have a wonderful support system here.