X Best friends(Dolan Fanfic)

Isabel and Kat used to be best friends with the Dolan twins. Isabel had liked Ethan for a while and when they finally confessed to each other the twins grew in popularity on you tube and the hate at school started to get to much for them to stay at school. They move away but never told Isabel and Kat why, so Isabel thinks it's her fault. but what happens when they meet again?