Billy didn't like you, and he made no secret of it.
Every time he looked at you, it was with displeasure, even a little annoyance. He would snort and make stupid comments about your songs not being good enough. He was just angry, really angry that they had rewritten almost his entire song for yours and for the fact that you constantly challenged him like no one else.
He hated having to listen to your comments about his music. Why couldn't you just shut up and accept it like everyone was used to doing? No, of course not; you had to open your mouth and ruin his day as always.
“We all agreed no 'Look At Us Now'," he says slowly, looking at you after you disappeared for a week to bother him. "If you had been here and hadn't missed practice, you would know."
Billy can't help but clench his jaw at your words, and he simply takes off his guitar when he sees you walk out that door, running to go get you, because he's not willing to tolerate your irresponsibility.
"What the hell is your problem?" He asks you, walking forward and grabbing your arm to stop you, while trying to hide how desperate he is for you to come back and not throw one of your usual tantrums.