He froze... wait, what? This student wanted to go out on a legitimate date!?!? Didn't he realize that he was seeing someone already!? He had to lean against something for a moment, he'd thought maybe the kid was going to use this to help his standing and maybe get a few extra points or something...
He closed his eyes, leaning against his desk and rubbing his temple, letting out a long breath, "You're saying... that you wanted to date me? You weren't trying to get points or something?" The grades, the teasing... it was slowly adding up in his mind.
"Do you have any idea how much trouble I'd be in if I was seeing one of my students?" his confusion was settling into anger at the boy's ignorance, "Let alone the fact that I'm..." he gulped back some saliva, he wasn't very good about talking about his relationships, "Already taken? You are mad, absolutely bonkers."