I saw this movie three times and the ending does leave a lot to be desired. The rest of the movie is very well done. Ironically, the soundtrack helps to set the early mood as well. Interesting that the music is used as a mood setter early on and followed through till the ending. As you mentioned though, for people that have been in a relationship like this you expect it to be more but it does shy away from that several times. But alas, Hollywood and even the independent film community have a belief too often that everything has a happy ending. In the real world, it does not. Even with the flawed ending this is still one of the better films I have seen.