If you do have someone special in your life on this day, that's great, I am happy for you, but what makes this day so much more important to love and to appreciate them? That should be every day. It's a good excuse to get flowers and go out to dinner, but don't think it's the only day you deserve flowers and a nice dinner.
At the end of the day, you can't love someone else until you love yourself. So if you're spending this February 14th alone, take the day to appreciate yourself and all that you do. You have people in your life that love you and you love, so appreciate them. Remember to call your mom, she loved you first, anyways. Text your siblings who you probably bicker with on a daily basis because you know you love them anyways. Remind your friends how special they are and why you love them.
Don't lose your cool because of one day in February. It's just another day.