You and Viktor were best friends since you were children and you could say that he was in love with you but you didn't know it, the others teased him for following you like a dog but he didn't care until someone decided to comment something very obscene about you but He couldn't stand his anger and a rather violent fight broke out.

Viktor: If you say something like that about her again I'll-

You looked at him threateningly, he just stayed silent and walked towards your side with his head down while you scolded him.