The two years he'd been gone from England didn't seem to matter anymore, just for a little while, because the way Susan was looking at him said there were possibilities for them. But then the lift jerked into action and she was gone, running just like he'd run, leaving Seamus standing there alone. He stood for the longest time just staring after her, even when the gate slid shut and cut off his view, the lift rising until it reached the Atrium. It took the space of several heartbeats for Seamus to get his wits about him and stumble out into the crowd, all oblivious to the way his chest seemed to be constricting. A few gave him a second look, so his face must have belied some of what he was feeling. Shock and hurt were foremost. Even if he deserved it.
First, he needed a drink. Second, to find Dean and then possibly have a drink with Dean. It was a true wonder he didn't splinch himself in apparating back to Hogsmeade. Once there, instead of doing anything he'd originally intended to, he retreated to his upstairs room with a bottle of the strongest whiskey he had in stock and drank himself into oblivion for the first time in years.