Here are some
![love](http://farm4.static.flickr.com/3103/3236538377_a7065a2cc4_o.jpg)
![love2](http://farm4.static.flickr.com/3261/3236539059_021721288a.jpg)
Here I duplicated layers, applied filter>blur>gaussian blur, then in blend modes, multiply or overlay.
And I am very fond of this one, in which I left the aperture to very low shutter speed while I "painted" the shape of the heart with a small torch, in a completely dark room.
![painting love with light](http://farm4.static.flickr.com/3344/3237381106_490133b75a.jpg)
And my daughter drew these hearts. Then I photoshopped them, adding color and a shadow:
![iloveyou](http://farm5.static.flickr.com/4027/4288770398_178eb4735e.jpg)
Enjoy your Valentine!