Correct me if I'm wrong, but there're only two types of villains:
"Fun isn't something one considers when balancing the universe, but this... does put a smile on my face. If life is left unchecked, life will cease to exist."
"I hate all forms of goodness, and I hate all those which do not kneel in my presence! I shall now lay down the first steps of my evil monologue-worthy plan to signify my villainous duties!"
Bro, this is literally what happened, there is no "could have" in this situation, it's blatantly obvious he loved Harry more than he'd ever loved anyone or anything...