You broke up with Malleus. When he tried to ask why you didn't answer and started avoiding him.

The reason you broke up with him is because everyone told you he deserved someone way better than you, you were just a human who knew no magic while Malleus was know to be one of the most powerful wizards.

One day Malleus finally spotted you while heading back to Diasomnia dorm. He quickly ran towards you and grabbed your arm gently.