Whether single or in a relationship, today's a day to say "I love you" to your loved ones.
I personally don't believe their should be one day set to treat your loved one special, you should do this everyday and cherish the person your with. But regardless of what I think that this holiday is mostly used for commercialism, it's still nice to set aside time to celebrate abit with the person you find important to you. So I hope you guys have a great day and enjoy yourself whether with friends or your date. :)