Here you go a list of episodes that feature Love in Futurama. All of them are somehow related with Love, and many of them with Valentine's day (Now updated with the movies and Season 6acv):
Love's Labours lost in Space: How a Planet Express charity mission gets compromised when Leela gets involved with Zapp Brannigan
DVD: Volume 1, Disc 1, Episode 4
A Flight to Remember: The crew goes into the luxury spaceship Titanic.. where love and tragedy surprisingly appears
DVD: Volume 1, Disc 3, Episode 1
Why must I be a Crustacean in Love: Where love goes when a mating Dr. Zoidberg gets relationship advices from Fry.
DVD: Volume 2, Disc 1, Episode 5
Put your Head on my Shoulder: Love goes extremely wrong when Fry stars dating Amy, and at the same time Bender opens a dating service office
DVD: Volume 2, Disc 2, Episode 2
Bendless Love: The fight between 2 robots (with serial numbers that are expressible as the sum of two cubes) for a fembot...
DVD: Volume 3, Disc 1, Episode 6
Time Keeps on Slippin': How to wind Leela's heart and then forget about it because of a time colapse in the universe
DVD: Volume 3, Disc 3, Episode 2
I Dated a Robot: An army of Lucy Liu bots is the main reason why you must not date a robot, specially tomorrow
DVD: Volume 3, Disc 3, Episode 3
Love and Rocket: Is interesting how a relationship develops if you go out with someone that can carry you inside..
DVD: Volume 4, Disc 1, Episode 3
The Sting: The most dangerous mission of the Planet Express crew makes Leela go crazy because of Fry's death.. or not..
DVD: Volume 4, Disc 3, Episode 2
The Devil's Hands Are Idle Playthings: What a man with the Robot Devil's hands can create for the love of a cyclops
DVD: Volume 4, Disc 4, Episode 4
Bender's Big Score: Fry or Lars is the question in this movie with time travel, paradoxes and love.
DVD: Bender's Big Score
Into the Wild Green Yonder: Fry has a power that can not share with Leela because he want to protect her..
DVD or Blu-Ray: Into the Wild Green Yonder
Rebirth: The love between Fry and Leela.. and other Leela.. and Fry and.. well, check it out
DVD: Volume 5, Disc 1, Episode 1
Proposition Infinity: Love between a human and a robot can be real.. but not approved by society
DVD: Volume 5, Disc 1, Episode 4
The Late Philip J. Fry: A love story that litteraly goes to the end of the universe.. and the starts again
DVD: Volume 5, Disc 2, Episode 1
Lrrreconcilable Ndndifferences: Aliens have feeelings too!
DVD: Volume 5, Disc 2, Episode 3
Don't forget to watch those episodes tomorrow and have some fun!!
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Love's Labours lost in Space: How a Planet Express charity mission gets compromised when Leela gets involved with Zapp Brannigan
