Then how come 4 out of every 10 people meet their spouse at work? According to a survey by the career website "Vault .com," almost half of us have had an office romance. And a quarter of those resulted in long-term relationships, and even marriage. But if you're dating a co-worker, you have to be careful. Here are some tips from Dennis Powers, author of "The Office Romance: Playing with Fire and Not Getting Burned".

• First, keep your relationship as professional as possible at work. That means no public displays of affection--They only make your co-workers uncomfortable.
• Next, you've worked hard at your career--You certainly don't want to jeopardize it. So, stay focused on your job, and don't spend your time flirting or sending email back and forth--If it affects your job performance, you might not be working there much longer.
• And finally, if you value your job, don't date the boss. Dating someone at the same level is fine. But 55% of employers and employees surveyed said it's not acceptable for a manager to date a subordinate. Your co-workers will believe that any perks or promotions you get are because of your relationship with your boss--And if you break up, it could completely derail your career.

If you'd like to go further, the book is called "The Office Romance: Playing with Fire and Not Getting Burned" by Dennis Powers.