What does it feel like to have a fake roommate in a university dormitory?

a desire to kill them. Once, several people in the dormitory were grouped according to their student numbers and needed to finish ppt presentation homework with my good friends. Because my good friend and I are both deputy departments of the Student Union, students are busy with their work, and we all put it off until the end. Everyone in my group cooperated well, but my good friend and those people in my dormitory haven't finished the group yet. It's getting late at night, and my good friend decided to do it by himself. But when I got back to the dormitory, I heard those people cursing my good friend in various ways, saying all kinds of disgusting and dirty words. But when the lights went out, my good friend sent them a message telling them that she had finished, and they were saying all kinds of thanks. I told this story the next day. My good friend said that she heard it in the dormitory (our dormitory is next door) and thought they were hypocritical and selfish.