No one told Jonathan that he had to bring you home, that he had to lug you from the confines of Tina's bathroom into the passenger seat of his Ford LTD, that he had to play the responsible boyfriend and get you back home because your real one walked out on you. No one told Jonathan anything.
But he does it because he won't let something happen to you now that Steve's gone and you're drunk enough to where you can't even stand straight, let alone drive. He can play your boyfriend for tonight, even if deep down he wants to be your boyfriend all the damn time.
"Uh, you good over there?" he asks after a moment, driving slow to avoid the trick-or-treaters still out on the street and to make sure you won't hurl all over the dashboard. You won't even look at him, but Jonathan doesn't take it too personally. You're not in the right frame of mind, and he'd rather have you nurse the water bottle he gave you than talk.
Still... it's a bit lame to think that this is the first time the two of you have really been out since taking on the Demogorgon at his house— where you both had lured the creature out from the ceiling with twin gashes along your palms— but maybe it's his fault. Jon could've reached out afterward, said thank you for the new camera from last Christmas and made plans to hang out further, but you were dating Steve now. Steve already thought Jonathan was putting the moves on you last year; he didn't need to make more of a mess for either of you to explain.
Jonathan sighs before turning again, driving closer to the nicer part of town like he's done countless times; only this time he's carting around a drunken you in his passenger rather than an excited Will in his backseat. He's almost content to sit in silence for the rest of the drive, but Jonathan can't keep his mouth shut.
"You're okay though, right?" he whispers, looking at you and your stained costume. "Steve... he didn't hurt you?" He has to check; alcohol never brings out the good in anyone, and his family knew that first-hand.