Think about it. When they first met at Madame Malkin’s, Draco tried to impress Harry. He didn’t know who Harry was and, no offence, but Harry was more than shaggy dressed. That means he was undoubtedly not Draco’s class. But Draco didn’t care. When they met again on the train, Draco offered his friendship. Harry refused. And that’s when the teasing began. Look at it this way: if Harry would be a girl, Draco would pull on his pigtails, would poke him in the ribs and would lift his skirt. But Harry is a boy, so Draco copes with his feelings in a different way. He follows Harry around to blackmail him somehow, he always starts a fight and he is mean to Harry’s friends to rise a reaction out of him. If that isn’t love or at least liking, I don’t know what else is.