Practice
"Wow, you look good today," Harry told the mirror, then frowned, and looked down at the book again.
"I love your eyes," he told the mirror and then tried to strain his features to what he considered a handsome face. After a moment he relaxed again and considered his book.
"You should wear this necklace more often, it's really makes you shine," he said with a smile, facing the mirror again.
A knock to the door interrupted him, and without waiting for an answer, Ginny entered.
Harry turned scarlet and hid the book behind his back.
"Erm… Hi," he said.