Valentine's Day is almost here and many of us find love at work, which can be awkward if it doesn't work out.

According to a new CareerBuilder survey, 37 percent of us have dated a co-worker, and a whopping 30-percent of those office romances have resulted in a marriage.

As for how those hookups began in the first place, 12-percent of folks say it started after an office happy hour, while 11 percent sparked after working late nights in the office. Another 11 percent of romances sprung from work lunches, while 10 percent attributed it to a chance meeting outside the workplace, and nine percent said they fell in love the first time they laid eyes on their co-worker.

Still, dating someone in the office is risky business, and not everyone is ready to announce their romance. Thirty six percent of those who had an office relationship say they had to keep their romance a secret, although 25 percent admit to having bumped into a co-worker while out on a date with their secret sweetheart.

And not every office romance is a healthy one. Twenty five percent of people admitted to dating someone in a position of authority at their office, while 19 percent admitted having an affair with a married co-worker. And of course, there is the inevitable breakup.

Believe it or not, only five percent of workers say they left a job because a relationship went bad.

The survey also asked respondents what qualities would make a colleague undateable.

Among them:

  1. Doesn't work on a consistent basis (39 percent)
  2. Has already dated someone else at work (25 percent)
  3. Travels extensively for work (21 percent)
  4. Has to work nights (8 percent)
  5. Earns less money than me: (6 percent)
  6. Has to work weekends: (6 percent)