Because boys and girls cant be friends

I said I know, what does that have anything to do with the situation? He said I don't know. And I responded with not that it is relevant but I have a boyfriend too.

Context: I am a graduate student and we all have desks in an office. I generally only goof off with people who I like, not to be a dickhead but most the grads students in my class have a stick shoved up their ass.

And no i have no feelings for guy what so ever. Just the fact I cant joke around is bothering me.