Kurt still didn't really understand what had made him feel compelled to show up here. He didn't even know what his own motivations were. And now all these old wounds were slowly starting to open back up and he did not want, he did not want that.
But here he was, and there was Blaine, kicking pebbles and looking like... Whatever. Maybe Kurt was reading into it wrong. Blaine wasn't his Blaine anymore. How was he supposed to know? He wasn't just going to assume his facial expressions and mannerisms still meant the same thing. For all he knew, his lowered interest in performing was just a small part of a massive personality overhaul.
Or, possibly, an outward symptom that he was being possessed by a pod person. Kurt had no way of knowing. That was how out of touch they'd been.
All of this was why Kurt didn't understand what he was still doing here. Why hadn't he made up an excuse and left? He'd had no problem doing that the week before. Instead of bolting again, however, the words that exited his mouth next turned out to be - "Parking lots are stupid. Do you wanna go somewhere?"