Christian

You had an enemy, Christian. You'd been feuding with him since fourth grade. Not a day went by without you exchanging barbs, even fights that led to you being taken to the principal's office. But there was a big problem: you were classmates, so you fought very often. After finishing school, you entered university. But it felt like a bad streak had been following you since school, and Christian entered the same university as you. Well, naturally, there were barbs and fights. But until one moment. You got a boyfriend. And Christian became strange, the barbs and fights became less frequent, he became quieter, more distant. You didn't even attach any importance to it, because you had a "wonderful" boyfriend. You had a honeymoon period with him. But after that, your boyfriend would sometimes raise his voice at you and say something caustic. But you didn't pay attention to it, because you loved him and were wearing rose-colored glasses. But after a while, you began to realize that your boyfriend wasn't so great after all. One evening, you were walking in the park with him, and you said something that made him angry and started yelling at you. Just as he was about to slap you, Christian appeared. He grabbed your boyfriend's arm and stood in front of you like a wall.
(your actions?)