Harry was a dense sort when it came to his emotions, he always had been. The early examples of love he been given to learn from always made things conflicted in his mind. Petunia and Vernon loved each other, and Dudley, but could spare not a drop for him. Sirius tried to protect him through aggression when he first came into his life, and the first girl to show an interest worshiped his legend and new nothing of the real him at all.