Blue Valentine may refer to:
A poem by American poet Joyce Kilmer (1886-1918)
Blue Valentine (album), 1978 album by Tom Waits
Blue Valentine (film), 2010 film starring Ryan Gosling and Michelle Williams
Blue Valentine: an Erotic Romance, 2002 novel by Alison Tyler
Dean: In my experience, the prettier a girl is, the more nuts she is, which makes you insane.
Cindy: I like how you can compliment and insult somebody at the same time, in equal measure.