After a moment, Stiles parts — but only barely — from the kiss and presses his forehead against hers. They've either just made things infinitely better for themselves...or heinously complicated.

"Took us long enough..." he jokes. Hopefully, she doesn't take his tendency to make jokes as an offense or affront. It's the way he deals with things and this is a big thing that can go one of two ways. He's hoping, obviously, that they don't feel like it's a mistake, but at the same time, there's the possibility that she decides it is. So yeah, there's anxiety there and it's awesome, but also...not awesome at all as he waits on tenterhooks for some sort of positive response. A negative one might be too much to take.