If you're looking for something to read to give you that warm, fuzzy feeling on The Day of Love, I have read no book that makes me that happy feeling more then "Extremely Loud and Incredibly Close" by Jonathan Safran Foer.
Although not touching upon romantic love in anyway, the deep love between Oscar and his father and the parallel story between his grandmother and grandfather reflects a love so intense it's hard to believe these people are fictional characters.
The book is written in a unique blend of photos, images, blank pages, and uses a play on kerning that creates a very unique, quirky narrative, much like the interesting, three-dimensional characters that you don't want to let go of at the end of the book.
This is absolutely one of my favorite books, and I couldn't think of a better read on Valentine's Day.
-- Lauren Williams