First, it would depend on what kind of relationship you have with her, and how strong your relationship is. Something that would appeal to her liking (does she have an interest in something special?). I hear of some people buying their partners stars online (somehow) I've asked and apparently it's not that expensive (I mean having a star named after you would be super awesome). Personally I don't like the option of roses and chocolates - they're so cliché and unoriginal. However a single rose would be nice though, unless she prefers a type of flower in particular. Try writing her a short, rhyming, and humourous poem :D Doesn't have to be perfect :) Isn't it too late though, Valentines day is like tomorrow? Anyways, Good Luck!