If you've cut her off, why do you still keep subtly belittling her? It was your decision that you wouldn't accept another confrontation/apology and your decision to cut her off, so that's great of you! I'd expect you to move on and forget about her. But no, instead you keep making subtle comments about copycats and plagiarism. That's immature for your age. while she's over there who's long accepted that what she did was wrong, and isn't afraid to tell the whole truth of what happened, not something one sided because you refused to let her confront you about what she did. She wholeheartedly respected your decision to cut her off, so please try to be more mature and move on from the situation.