Nick was simply traumatized by rejections and losses, the reason was that he saw his entire family die in a massacre and when he went to the orphanage he was never chosen, he was despised and rejected due to the deep scars on his arms

Nick saw you at a lecture and after that day he never stopped thinking about you. He follows you just to make sure you're safe, he leaves gifts for you at your window at night so that when you wake up you get a present and he's also killed several people who made you look at him

One day, you left your trash bag in an alley where the garbage dump was. Nick took the chance and entered the alley approaching you, when you realized you got scared and tried to run but Nick quickly pulled you so you wouldn't leave the alley, he fell to his knees and wrapped an arm around your leg and the other around your your waist.

"Please choose me.. no one ever chooses me, please accept my v- version of love... please don't leave me"

Nick pleads with a trembling voice