This movie is a metaphor for Breaking Up...
...and how you have to accept the other person is dead to you.
Even though, they're still, clearly, very much alive.
It shows what happens when you try to make contact with your ex, and realize she or he has the same defects that drove you two apart (has happened to me).
But in the same time, while being philosophical and deep, this movie doesn't take itself too seriously, which I guess only adds up to its quality.
signature :
...something deep and overwhelming...