Congratulations - wonderful news! You've gotten into a world-class department and I'm sure you have a bright future ahead of you. But I urge you to withdraw your applications from the remaining schools, see the posted link for some inspiration. There are a lot of waitlisted folks out there (and folks who will be waitlisted) who feel exactly the way you did after being rejected from Arizona. I applied as a theorist so none of this applies to me. Now go celebrate your amazing UNC acceptance!!!