This year, Valentine's Day coincides with the Chinese New Year. It's the Year of the Tiger: Will you be a wildcat or a pussy cat? Or perhaps a pink panther?
We are approaching the New Moon in Aquarius, but most of Valentine's Day occurs with the Moon in Pisces (the ingress happens at 7:23 a.m. EST). This Piscean feeling is strengthened by the Sun/Neptune conjunction. It's an auspicious day to be emotional and downright mushy with both friends and lovers.
If you're not sure what to do with your sweetie tomorrow (other than the obvious), you might consider taking in a movie or three, having a photography or video session (use your imagination), sharing and perhaps indulging in a fantasy, a champagne-soaked brunch, liquor-filled bonbons, or evening wining and dining. However, be careful not to indulge too much in alcohol or any other substances that may affect your ability to stay conscious.
If you don't have a sweetie, but do have a crush, tomorrow is an optimal day to declare your feelings, as long as your crush is actually available to be amenable! Seriously, with elements of fantasy running so high, you should ask yourself before declaring yourself if you are infatuated with the actual person, or with the idea of him/her.
As I mentioned earlier, this is also a wonderful V-Day to spend with close friends. In fact, it is entirely possible that platonic feelings between friends may turn more, well, Plutonic. Again, as long as you don't let the fantasy aspect (it's pretty romantic to fall in love with a friend) and too much to drink overwhelm what's truly going on here, a wonderful time could be had.
Whatever your situation, Happy Valentine's Day!