Hermione had taken the hidden compliment and used it to fuel her practice with Draco, who was persistent in finding his happy memory for his Patronus without her help. She had offered to help him make plenty of new good memories, and more often than not he took her up on that promise, but he had yet to cast a fully corporeal Patronus. Whenever she breached the topic of happy memories he would pull back - until she suggested they make new ones of course, then he was all eager again.