Thirty-four percent of workers who say they have dated a fellow employee ended up marrying their co-worker, according to an online survey by CareerBuilder.com.

The survey, which included 6,169 workers, found that forty-three percent of respondents admitted to dating a co-worker at some point in their careers. One-in-ten respondents said they currently have their eye on someone at work who they would like to date in the near future.

Thirty-four percent of workers said they had to keep their relationship with a colleague a secret. Twenty-two percent of workers admitted they have dated a colleague who was married, and 27 percent have dated someone who holds a higher position than they do in their organization. Fourteen percent have dated their boss.

Women were more likely than men to date someone higher in their company's hierarchy. Thirty-four percent of women said they have dated someone who holds a higher position in their organization; 21 percent of men admitted they have done the same.

"While office relationships are more accepted today than 10 or 20 years ago, workers need to remember to keep the romance off the clock," says Rosemary Haefner, vice president of human resources for CareerBuilder.com. "Maintain your professionalism at all times and don't let the relationship affect your performance at work. Seven percent of workers said they have left a job because of a romantic relationship with a co-worker."

Twelve percent of workers said their relationship with a colleague began when they ran into each other outside of work. Other top scenarios where office romances found their spark:

• At lunch (11 percent)
• Happy hour after work (10 percent)
• Late night working (9 percent)