Friends or not (One Direction Fanfic)

"I have no friends. I am a waste of breath. My best friend has moved on. I can't do nothing! She already forgot me. She has moved on with Harry Styles, that's the worst." Isobel exclaimed to her empty room

Millie and Isobel were best friends since forever. They were meant to be friends forever and ever but things changed because of a mistake. Will Millie forgive Isobel? What drama will develop with Millie's new boyfriend?