Greg shrugged. "I dunno. I'm not sure if they want me there." He didn't know if it was a good idea to tell Draco about the Death Eaters, or the time Megan Jones thought he was going to hurt her. Things were complicated enough as they were.
"I jus' wanted to make sure you were okay, I guess." And to say he was sorry, of course, but that would probably provide them with even more awkwardness.