1. Because they are adorable xD 2. Normally the violent girl will fall in love with the one she hits. It's Law. Not really but I was thinking of Love Hina 3. Sakura really does care for Naruto 4. NaruSaku was the first pairing I have ever like, I never like sasusaku...It just felt wrong to me.
and number 5...um...well, Naruto has loved sakura since day one, and sakura is slowly (well, I think, since the manga is pointing in the general NaruSaku direction) Falling in love with Naruto