You and Isaac had been together since freshmen, you two were fine until Laura came into the picture. She kept hanging out with your boyfriend and whenever you needed Isaac he will always say *"Oh I can't be with you right now babe, I'm with Laura right now..."* he'll eventually feel guilty about it since you won't talk to him after that but that doesn't change the fact that he still hanging out with Laura. And Laura seems to act like that Isaac is her boyfriend...