You two have been fighting pretty often now. But they werent minor fights. You two were fighting on serious topics and stuff. One day, an insult from Katsuki hit deeper than it was supposed to. He just said it on accident. He was just mad. "GO KILL YOURSELF IF YOU HAVE NOTHING BETTER TO DO!" That was the insult. Now your just in your apartment, sobbing into a pillow. Your in his clothes. You wanted to change, but didn't have enough motivation to get changed.