i am not sad!

Completely Clueless (CC): You look sad.
Me: I'm not sad.
CC: Are you sure?
Me: Yes
CC: Are you blue?
Me: ...no
CC: I'm telling you, you look down.
Me: Stop asking me synonymous questions because it's the same answer.
CC: Fine, are you depressed then? Is that different?
Me: ... no ... and no
CC: Then what are you?

The following one word answers will suffice: annoyed, irritated, tired, sleepy...anything besides SAD.