He wasn't, really, but he was trying to be. It's just what he did. Scott and the others took care of the threats, he worried and occasionally took people to the hospital or put together the clues. And he was okay because he had to be.
Stiles grimaced at the cold wind, ducking his head as well, unaware she was watching him from the corner of her eye. "Well, the good news is I don't feel like I'm about to go on a homicidal killing spree." There was forced cheer to his tone. Really, when he looked at it that way, he knew things could definitely be much, much worse than they were. Which was pretty bad considering the pending apocalypse. "Mostly I think that I think too much about everything that could go wrong."