Coast by TPod http://www.fried-potatoes.com/fanfiction/viewstory.php?sid=20
Story Summary: A yearning for sourdough and San Francisco...
While not a Valentines fic, this is pretty fluffy if you ask me. Alas, it is short! But, a lot is said in less than 2,000 words, here. All I can say is, Klaus is precious in this, with his vulnerable internal monologue and all, and the way Dorian nearly shuts down is hilarious.
Not Always A Crowd by Ara http://www.fried-potatoes.com/fanfiction/viewstory.php?sid=12
Summary: James feels unloved when Lord Gloria’s attentions turn to others.
Snowbound by Cassie Ingaben https://archiveofourown.org/works/42742
Summary: Dorian quotes the Grimm’s version of Snow White.
I know it’s not exactly fluff, but it’s close enough to qualify because of Klaus’ unyielding tentativeness to Dorian. I just... eee.
Major Butterfly by Anne-li http://anne-li.slashcity.net/majorbutterfly.html
I just... They are destined for each other. The sweet little touches and storytelling within the story... Gah! It’s so sweet!
Courting Dorian http://belladonna.org/Fanzine2/courtingdorian.html
Klaus goes a-courtin’. In a very Klausian way, of course. Heh.