"Sensitive ass"

Need some help/advice. 
If my SO says a joke or a comment and I don't laugh at it or acknowledge it, he says " you're so sensitive, I can't say anything without you getting upset" 
Which is Not true, and if I tell him that I don't like when he calls me that, then he says "my point proven!" 
How do I even get across to him that I just don't like being called that!