When Alec's drama friends came over, Sloan kind of awkwardly scooted back to sit by Xander, having not quite figured out how to interact with them since her breakup with Emily, and anyway, it was Xander's birthday too, so he deserved some of the attention.
Milo had crept into the cafeteria, and watched the little gathering at a distance, trying to decide if he should walk up and engage with them, since after all he was going to go to their party, and it'd be weird not to speak to them all day and then show up, but then there was a whole group at the table, and, well... He just, he couldn't... Be amongst that. He'd have to introduce himself to all of them, and then he'd have to explain why they didn't know him, and probably how he met Alec and Xander, and they probably didn't actually want to hang out with him anyway, so he decided to slip away until the number of people died down, then he'd say hello. If he could find the courage.