Okay to all of you Drarry lovers out there, read this:
There are many speculations about Draco having a crush on Harry, and the ship “Drarry”.
Draco offered his friendship to Harry in the first book, and when Harry rejected him Draco did everything to make Harry´s life a living hell.
I personally don't think Draco had a crush on Harry. I think deep in there he really wanted to be his friend, he wanted a real friendship. And Draco isn't really good at expressing feelings so he pushes them away and starts to tease Harry and his friends. He had some kind of deep feeling for Harry.
Tom Felton has said it himself:
“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 that he was undoubtedly not Draco´s class. But Draco didn't care. When they first met on the train, Draco offered his friendship. Harry refused. And then that´s where 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 shirt. 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 with him and he is mean to his friends to rise a reaction out of him. If that isn't love or at least liking, I don't know what else is”
I believe that Draco may have had some feelings for Harry that he didn't want to have.