When he nearly ran into her, he was prepared to try, with quick reflexes, to somehow salvage anything that the person he nearly ran into could have dropped, but his reflexes were human now. Clumsy and not nearly as fast as what he was used to. When it turned out it was Meg, Castiel felt a wave of relief run through him because he'd wanted to see her. He wanted to get to know more people in the town, to form bonds and friendships, because he couldn't claim he had too many friends at this particular time, but Meg was still high on his list. He noted that she seemed happy to see him, but it faded into something else. Something he couldn't quite place and that caused a mild confusion to play along his features, because he wasn't sure why she looked that way. It was rightfully in place when her comment came, because his brow knit together at it.
"No... I was simply walking through town. Why would I be seeking someone that is on fire?" He knew what she meant by 'date', although there were alternate meanings to the term, like the fruit or just the numerical day of the month it happened to be. No, no matter that he actually understood what she said, in part, there was no one in town that he was currently on his way to see. He was thousands of years old, a former angel and newly human, he was not an uncomplicated creature and that much they both knew. That, and if there was anyone he had any sort of romantic inclination toward (because he associated the act of 'moving furniture, to that of the feelings that he didn't understand but knew he felt for Meg) it was directed toward her and her alone.
"I couldn't stay in the apartment any longer. I... wanted to observe the town. Its people."