Severus' head tilted a bit to the side, he couldn't help but wonder whether it was true, that he had turned that to be an insult. He pursed his lips, he just didn't even consider the fact he could be attractive. He used not to even hope he could be. Now though, he was hoping he could be, somewhere deep down, and he really didn't want to think too much into it.
He looked at her at the greeting, and nodded: “Good night, Lily...” he muttered, letting go of her arm and watching her move away for a moment, before he turned towards the great hall.