She had never been clumsy or flustered before. He made her stutter and fumble about. She would catch a glimpse of him and trip.
She could see his trademark hair from miles away. Even though they were friends, she felt almost uncomfortable around him now. Her heart would stutter when helping him, her cheeks pink.
She gazed at him during potions, and forgot a very important ingredient. She was almost aware.
Again she looked at him across the hall, and walked closer. She lost her footing. He caught her quickly, and she had a realization.
She was falling for him.