Make a quick excuse.

You deflect him gently so he kisses your cheek. "Well, Ethan, I had a lot of fun, but I have to go and see about my trigonometry homework before going to bed and it's already late," you say.

He looks at you in shock. "You haven't done Mrs. Donovan's trig homework yet!?" he says. "You're never going to have time to finish it now. Oh, Parker, I'm really sorry. I didn't know. Don't worry about it, though. I'll make it good with Mrs. Donovan for you."

You're not sure what that's all about, but you thank him and head off to your room.