Tom Riddle and you had an argument again. You didn't know that Tom Riddle had feelings for you and it drove him crazy mad that you didn't realized.

once in a evening you walked in the slytherin common room and Tom already sat pissed in his chair. Tom immediately started to argue with her.

"You're so dumb and stubborn sometimes. You know that?!" He hissed at you from his chair. Obviously mad.