Stiles hit his head.

Really, really hard.

Which didn't exactly explain why Derek was stuck looking after him, but it at least explained why the kid was talking like a doped up idiot. It might have also been partially because Derek, who had never needed pain medication in his life, had been put in charge of administering Stiles' last dose.

He also might have given him an insey bit too much, but that wasn't his fault, because really who puts the born werewolf in charge of the pain meds?

Scott apparently.

Idiot.

So, Derek was stuck sitting next to Stiles' bed making sure that he didn't fall asleep because concussions are totally a thing and he's the only pack member who wouldn't miss school by doing it.

"der-"Stiles slurred flopping his head from one side of the pillow to the other. "whyre you so fluffy?"

Derek glared.

"I am not fluffy."

Stiles laughed, "mmmkay sourpants, hows about" Stiles paused a moment letting his thoughts catch up to his mouth which, even as slow as it was going at the moment didn't seem to be fast enough before saying, "blurry, you're blurry."

"you're highly medicated, I am not blurry." Derek replied.

Stiles looked offended, chin dropping low and leaving a chasm of surprise in its wake. "You drugged me?"

"I gave you pain medicine." Derek replied rolling his eyes at the dramatics of the kid in front of him.

That seemed to placate Stiles.

"Oh—"he smiled, "You're the sweetest dere. I knew you didn't hate me."

Derek snorted.

Of course he didn't.

Sure Stiles was annoying, but he was also funny and loyal and interesting and smart and helpful and adorable and se—

Derek stopped that train of thought right on that track.

Besides you don't save someone's life so many times if you hate them, that just doesn't make sense.

"Derek." Stiles said yawning and wiggling himself deeper into his blankets, "I'm sleepy."

"No sleeping" Derek replied, worry flashing through his eyes.

He really didn't want the kid to be in a coma, not on his watch, especially. He couldn't handle that shit on his conscience. Not that he could really deal with it if it happened on anyone else's watch, he just generally didn't want Stiles to be hurt.

At all.

Ever.

"Derek— "Stiles yawned, "you're the best imagination boyfriend ever."

Derek stared at him a moment, heart lodged in his throat because—what the heck?

Not that he wouldn't be the best Imaginary boyfriend ever, because he would. A real boyfriend too, well at least to Stiles anyway. But he wasn't going to let himself get overly excited about the fact that Stiles was saying any of this because he was sure that if Isaac was here he probably would be getting the whole "you're the best imagination boyfriend ever."

It wasn't personal, even if he wanted it to be.

"Don't say stuff like that." Derek replied frowning, "you don't mean it." Derek sighed, standing up and re adjusting the blankets around Stiles, hell if the kid couldn't sleep he might as well be comfortable. Not to mention Derek kind of liked taking care of him; but seriously we weren't mentioning that, like ever.

"Yes I do." Stiles said indignantly wriggling around in the blankets, "you take care of me, and you're tucking me in, and you're not even frowning." Stiles listed smiling at him like a toddler with a candy bar.

"That doesn't mean—"Derek started only to be interrupted.

"Plus you're pretty, and I love you." Stiles yawned, "Can I sleep yet?"

Derek checked his watch, it had been four hours, which was as long as Deaton said he should be kept up before he could sleep, plus the kid was tired.

"yeah." Derek replied pulling the blankets up around Stiles' shoulders, not expecting Stiles' arms to shoot up and wrap themselves around his shoulders.

"Sleep with me?" Stiles said eyes wide and honey gold and – really distracting to be honest.

"I wha- Stiles, no." Derek replied, flustered.

"Not like that." Stiles said pulling at Derek who managed to hold himself up despite how much he really would enjoy just falling down into the sheets, he had been up all night too, with the fight, and then Stiles being hurt—he really could use a nap.

"Just sleep." Stiles yawned, "In this bed—with me."

Stiles tugged at Derek again and this time he let himself fall into the bed, curling up beside Stiles on the other side of it. Stiles grinned at him scooting closer and nuzzling his head into Derek's chest.

"Best boyfriend ever." Stiles murmured, yawning a small adorable yawn and dozing into sleep.

Derek smiled, wrapping an arm around Stiles' waist.

Maybe he would wake up pissed off; maybe he would never want to speak to Derek again.

But Derek was really sick of denying himself things that he wanted, so he curled closer to Stiles, pressing his lips to the boy's forehead lightly, before closing his eyes and whispering, "I love you too."