Puck didn't know why he had agreed to let Buffy look after him. She was a Vampire Slayer, sure, but she didn't have her powers or anything right now. What if he got hungry around her? What if she accidentally cut herself or something and he ended up killing again? Buffy couldn't defend herself and Puck really didn't want to hurt anyone else. That was why he had decided to skip the complex when he first changed. After attacking Kurt, Puck didn't think that hanging around the apartments had been a good idea anymore. Beth was there. If there was anyone in the world that Puck never wanted to hurt as long as he could help it, it was his baby girl.
Avoiding the complex hadn't done him any good either, though. Puck had killed someone and, try as he might, even he couldn't pretend not to be phased by at all. He was a badass, sure, but he wasn't that bad. He couldn't risk going back to the complex now, not even for a second, and when he only had but so much cash on him and very little time left before the sun came dipping back up along the horizon again, Puck found he had very few options left. He had to go to Buffy. Maybe she couldn't defend herself, but she still knew vampires. If she could figure out a way to keep him acting from a crazy person, then maybe everything would be okay. Maybe no one would have to get hurt or die or watch him be a freak again, with the stupid blood drinking and goddamn. Puck really, really liked the blood drinking. He wasn't supposed to - drinking blood was supposed to be gross - but he did.
He didn't need to be thinking about blood right now, though. That was a bad plan, especially since he was currently standing outside of Buffy's place. Shaking his head, as if that would rid the thought from his mind entirely (it didn't), Puck raised a hand and knocked on Buffy's door awkwardly. Then he shuffled back a few paces, slid both his hands into his pockets, and tried not to look too pathetic. Easier said than done.