More than anything this movie does is that it gives you the feeling that you only have a limited amount of time on this planet and you don't know, you may die the moment after you read this. You should at least let all you have in you out, so the important ones in your life know how you feel about them before they die or you.
To me this movie is a complete Love story. No matter if one dies in the end, they both were in love and they both knew it. That's all that matters and everyone who worked in this movie portrayed this very well.