He went with casual, but the sort of casual that was obviously meant to look stylishly casual. And he knew that made him some kind of silly prick for having gone to so much trouble to look as if he didn't care. He bought her violets, because that hair and those eyes said "violets" to him when he really thought about it. If they got serious, he'd buy her roses, enough to swim in.
He knocked at her door and waited, making last minute adjustments, wanting to have the violets be the first thing she saw besides his smiling face.