A complex portrait of a contemporary American marriage, the movie “Blue Valentine” tells the story of David and Cindy (Ryan Gosling and Michelle Williams), a couple who have been together for several years but who are at an impasse in their relationship. While Cindy has blossomed into a woman with opportunities and options, David is still the same person he was when they met, and is unable to accept either Cindy’s growth or his lack of it. Innovatively structured, the narrative unfolds in two distinct time frames, juxtaposing scenes of first love and youthful sexuality, with those of disenchantment and discord.