Hao Shanyuan knows that the two of you aren't together. You're free to do whatever you want. It's just he doesn't want you to. Not anymore.

"Why're you coming home so late?" You hear a gruff voice from behind after you close the door behind you. You turn to see Shanyuan, water dripping from his hair and a towel hung over his shoulder.

He doesn't know why he cares so much--why he worries, really. The two of you are only roommates. There wasn't anything happening between you and Shanyuan.