Bi Polar-Mate

" Have you ever had the roommate that you love to hate; hate to love; envy and then get happy over? Yep, that's my life now."

Louis Tomlinson never hated anyone in his life, he was always nice till he got in college and got a roommate. Not scary at all but his roommate just didn't like him right off the back, not giving Louis a chance: Harry Styles was what he hated. But why does he switch all of a sudden from hating Louis to Hanging and laughing with Louis? Louis is confused about it all, why is he like that.

What's wrong with Harry Styles?