He might have had a bit of a motor mouth and a reputation for being perma-hyper, but Drew was a good enough friend that he knew when to shut up and listen, and that's exactly what he did as Alfie stumbled through his explanation.
He flinched a little at being reminded of the Ministry - he couldn't pretend it wasn't happening if people spoke about it after all - but he listened on. "So you kissed him and he kissed you back?" Drew asked, making sure. "So... then what?" He should have been more surprised that Alfie had wanted to kiss another boy, but he'd made out with enough 'straight' guys to not be surprised by revelations like that. He didn't want Alfie to feel awkward either.