Blue Valentine
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Through flashbacks we're shown their shy beginnings and the events which rush the couple into an all-too-quick marriage. The effects of this are all to obvious on the current state of their relationship.
I liked the film enough to sneak it onto my Best Movies of 2010 list. Williams and Gosling carry the film with a pair of strong performances of two people going through the motions of a doomed love affair which should have ended years ago.
Available on both Blu-ray and DVD the extras include deleted scenes, a making of the film featurette, and commentary with Cianfrance and editor Jim Helton.
It's certainly not a great date movie. Think of it as 500 Days of Summer without the laughs, but if you're in the mood for a romantic tragedy, and missed this one in theaters, it is worth a look.