Alfie did hurry the last few steps once he knew Goyle had spotted him, but just shrugged. "It's a longer walk from Hufflepuff." Which was true, but it wouldn't have taken him that long. Since he knew no one but Hufflepuffs knew exactly where their rooms were, though, he felt okay with saying it. How would Goyle know?
He swung his bag around front so he could dig in it, and came back out with the potions assignment, handing it over. He wanted this over as fast as possible.