To the left is some beautiful heart garland. Pattern here http://www.skiptomylou.org/2009/01/28/crochet-heart-garland/
To the right are some cute 3D hearts, could be make both with or with out the face. These kind of remind me of those sweet tart heart candies. Pattern here: http://www.roxycraft.com/crochet_hearts.htm
To the left, is your loved one a diabetic, or have a food allergy to chocolate? You could crochet them a box of chocolates. Or if you don't have a loved one and just would like to make a nice decoration for your house that can be brought out year after year.
Pattern here: http://www.redheart.com/free-patterns/crochet-box-chocolates
On the right is a valentines basket weave sachet. Downloadable pattern can be found on the following blog: http://my-pattern.blogspot.com/2010/01/valentine-basket-wave-sachet.html
There nothing more simple and timeless than granny squares, here's a tutorial for granny hearts: http://sandra-cherryheart.blogspot.com/2011/06/granny-heart-tutorial.html
You've seen the nice and the sweet patterns, now it's time for something a little naughty!
Looking to spice it up in the bedroom? Try making this, Sleeping mask or not!!! Pattern can be found of ravelry, you do need to sign up for the free membership to get patterns from this site.
How about this Love Lace Lingerie? Pattern found here: http://www.creativepartnersllc.com/Pattern-LoveLaceLingerie.html
And finally for the person that does not have a valentines date... Apparently you can buy all sorts of "crafty" things on etsy.