Remus had hoped that they could just transition into curling up together like they sometimes did and that it wouldn't abruptly change anything. But he'd been wrong. He could feel Sirius shifting and could almost sense the disappointment and fear lingering within him. It made Remus afraid too; what had he done by derailing that moment? It seemed to have a tremendously negative effect on Sirius. So much so, that he was saying he ought to leave? Sirius never left him when he was recovering like this.
He wanted to tell him no, to tell him he didn't want him to leave, to plead with him to stay. But that wasn't Remus; he couldn't ask Sirius to stay in a situation where he felt uncomfortable. The more he thought about it, the more he thought he understood. Why would Sirius want to stay with someone who couldn't give him what he wanted? Why would he want to stay with someone like him when he could be out having a laugh with someone else?
All he could do was give a short nod. Slowly, he drew back from him. "I'll see you tomorrow then," he said, trying to hide the disappointment he felt inside. He didn't plan on getting out of bed until morning.