Long story short I work in a business and I'm 15+ years younger than everyone. Obviously I'm always going to be the new guy who gets picked on. Found out today the guy who does it the most has a thing for one of the girls there. I don't shit where I eat but I can tell she has an interest in me. Need help using this to fuck with him.

I was planning on just gaming her in front of him but what other little things could i do?