Harry Potter and the Half-Blood Prince

I really liked the last 5-6 chapters, but over all this was not my favorite. Even though learning more about Tom was important and the way it happened, the characters involved was good, I just couldn't really like it. The drama with Malfoy was pretty boring, but I wasn't surprised by it because I wasn't hated the relationship between the 2 from the 1st book. Another thing that really disappointed me was the sudden interest Harry has for Ginny, it seemed out of nowhere and rushed and I thoroughly disliked it, I think that when he was spending his summer vacation at the Burrow there could be a moment where the 2 of them were alone and interact closely.
Over all it's a well developed story, and it got me gripped to the book all week, I read it in every opportunity I had.