It's a little too late in the day to be ordering a weighted companion cube pendant — but it's never too late to say "I don't hate you".
Michelle StarrScience editor
Michelle Starr is CNET's science editor, and she hopes to get you as enthralled with the wonders of the universe as she is. When she's not daydreaming about flying through space, she's daydreaming about bats.
If you poke around the internet, there are a lot of fan-made Portal valentines to be found. But it's pretty hard to beat the official printable Portal Valentine's Day cards from Valve, released two years ago, in 2011.
There are six cards to be found on this free download (PDF), featuring GLaDOS, Chell, sentry turrets, a weighted companion cube and an intelligence sphere.
If you prefer something that can be emailed, Tumblr user Tealgeezus has created some adorable animated gifentines, featuring GLaDOS, an intelligence sphere, a sentry turret, a weighted companion cube, the space sphere and Cave Johnson's combustible lemon.
Alas, zerotux has deleted his Imgur album of Portal valentines created last year. Only remnants can be found, like these ones drifting around here.