Top 3 underrated romantic movies to watch on valentines day?

Well, I wouldn't call my picks underrated but they never show up among the favorites here in the movie spot. They are:

Once (2006)
Before Sunrise (1995)[there's a good sequel if you like this one]
and A Little Romance (1979)

There is this French film, Love Me If You Dare, one of Marion Cotillard's best roles, in frankly one of the most unique and different love stories I've ever heard. The writing, the idea of it is just brilliant