Yes, that was a very sad film! Dorothy McGuire was wonderful in her role.
I love the song of the movie title. Great minor key song and unique for a 'standard' as it relates to it's chord progression.
Oh, and the movie is good but, yea, sad. McGuire does well but she is good at playing the ugly duckling (I don't mean that as a knock on her but she was cast in that type of role more often than any other actress of the era).