Billy stared at her for a couple of seconds, wanting to say a million different things but not sure if he should say any of them.
Sheldon's voice shook him out of his daze and he blinked, and then paused, realising what Sheldon had just said. Was he blinking more? Okay, now he was super aware of that.
"Uhh, come in," he said, stepping aside.
"Uhm, Penny, this is Sheldon, he's my new roommate. Sheldon, this is Penny."
He blinked again. Damnit, why had Sheldon pointed that out?