So how do I get senpai to stop noticing me?

This new guy at rehab has a crush on me. He's always trying to find the littlest excuse to talk to me. He's like a puppy dog constantly begging for my attention. He ever was trying to get me to give him my number when the other therapists had left the room which is 100% against policy I just want to be like, "Yeah, I really like spleens and bathing in the blood of the non believers" just to see what he'd say/do. Either it'll turn him or he's a total psycho like me which means I'll have to get rid of him because there's only room for one friendly neighborhood weirdo in this small town.