My BF EX SUCH A........ Is it ENVY?

She might very well be jealous of you and your boyfriend, but her immaturity doesn't give you an excuse to act immature around her. Don't give her the satisfaction of letting her get to you. Ignore her obnoxious behavior as best you can. If she continues to harass you or your boyfriend at school, report her to the principal. In any case, you should keep reminding yourself that, in four more days, she won't be a problem for you or your boyfriend anymore.