Honestly, just wait it out and ignore it. If you don't give her any attention, she will probably give up. Time heals everything and hopefully she'll get over it sooner rather than later. Stay out of her way and she'll stay out of yours. Don't stoop to her level because that will really only make things more messy. If you let her get to you, she wins. :]
She's being immature in this situation, so show her that you're more mature. Then you wiiiin
. Be glad that you're not going out with this annoying-sounding girl anymore!
She's being immature in this situation, so show her that you're more mature. Then you wiiiin