Alex stays well away from the Tampa enclavers for a good few days after the fight. Karl can go fuck himself, and it's not like Alex doesn't have other things to worry about. He has way too much homework, since he was spending all his time on the stupid group project, he almost had an argument with Toby about the Tommy thing, Niki's started giving them all the stink eye for some reason, and he's still having dreams about Schlatt (saying nightmares makes him feel like a pussy). Only now sometimes it's Karl screaming at him instead, so that's fantastic.
So between all those things, he loses track of Nick for a while. He's genuinely surprised when he opens the door to his room and almost walks into him.
Nick looks like he's been crying.