"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." But to get to the third stage, someone has to show you the right direction.
Louis sees a copy of Love Actually in a gas station during a pit stop from one city to the next and buys it knowing it’s Harry favorite movie. Harry tweets the lyrics to one of the songs in the movie a couple hours later indicating he received the gift.