No One Wants to Be My Roommate

My deskmate has been looking at me strangely lately. Whether I was going to the cafeteria to eat or attending physical education classes, they all avoided me. Finally I couldn't help it any longer, and grabbed my deskmate and asked, "Did I offend you somewhere?" She was frightened, took several steps back, distanced herself, and evaded her eyes: "No, it's not your problem!" But she turned around and voluntarily demoted herself from the key class to the ordinary class. I went to ask her doubtfully, just standing at the door of her new class. My deskmate, who was chatting leisurely and comfortably with others, suddenly trembled all over and screamed in horror: "It's really none of your business, please don't come to me, please!"