"What would you call it, then? Making sure that you were still quite alive after his attempt to snog the breath out of you?" Severus had seen the light kiss between the two and how much Lily seemed to be enjoying herself overall. He hated knowing that he was always doomed to stand across a room, watching her enjoy herself with someone else, while he was eternally cast aside. The hope that he may have held was falling onto swiftly breaking knees, almost ready to give up.
"Anyway, not that I don't enjoy this charming conversation, but I did want to... thank you for the —" Just how would he refer to it? Gift? That didn't seem appropriate, not when he was letting himself wallow like this. "— the memory that you sent." Still insufficient, but it would have to do.
What he didn't reveal was just how much it had brought him to dash the awful images of the dance from his mind, and actually pulled a smile from his brooding expression. For a few minutes, he'd let himself drift in the memories of a much happier time, when Lily only knew him and their shared magic.