I love the way Rowling subtly developed their love story. Harry and Ginny are amazing couple because they are incredible characters on their own, who come together to become even greater in a world that needs more love.
I was so sad that they didn't include this part in the movie. It was one of the saddest parts of the book. Harry's longing for Ginny while he was out looking for horcruxes was such a testament to his wishes for her saftey. If he was being selfish he would be with her then but he knows it is safer for her without him and so he bears the pain of being apart from her. Not only is it utterly romantic but it is yet another definition of love that the novels shows so well.