For this Valentine's Day, here's a survey about love where it REALLY matters . . . on FACEBOOK.  Thousands of Facebook users were surveyed about their relationships . . . here's what they said.

--Among single people, 78% list themselves as single, 14% don't list a status, and the other 8% lie by saying they're in a relationship.

 --People who are dating but not engaged are the only ones who reported using the "it's complicated" choice.  6% have their relationship status as "it's complicated."

 --3% of people who are engaged list themselves as single.  So do 1% of married people.

 --For people who say they're in a relationship but don't list the person's name, the main reasons are privacy . . . and crazy exes.

--55% of the people surveyed plan on going on a date tonight, or having a night in with their significant other.  6% are planning on having a first date.  22% will spend time with their friends . . . and 12% are not planning on celebrating at all.  (--The remaining 5% responded with "other".)