Harry Potter and the Half- Blood Prince

I've just finished reading the fourteenth chapter of Harry Potter and the Half-blood Prince. The title is Felix Felicis. It talks about Harry seemed to have added this lucky potion which he earned from Slughorn in the Potions class into Ron's Pumpkin juice in order to elevate his mood and try his best in the Quidditch game that day. He had succeed in it. However, this has happened during a time when there is a strange thing going on between Ron and Hermione and nothing seems to be able to mend it. Ron was angry at Hermione kissing Viktor Krum before and deliberately intimated himself with Lavender Brown to annoy her. I can't help but wonder at Rowling's exquisive ways of exploring into the minds of teenagers as her protagonist grown into that age. She interwoven the incidences of the ever growing dangerous wizarding world with teenage problems inside the schools. She's just brilliant. I must say. Everybook seems to have its own central issues and is different from the others.