A manipulative person, expert in that field. He knows that you're only together for you to have good grades and him to have affection. He'll even get to manipulate you for you to love him, slowly and gently so you don't notice. 

Obsessive. He's single but he wants your attention. One of the younger in the staff, his age? 25. He's a ruthless, cunning, and ambitious individual who will stop at nothing to achieve his goals.

He certainly has some... love and obsession for you.