Quick tips for office romance

1. Know your company's policy. Dating a co-worker's not illegal, but if it violates your office's policy, it could get you fired. Check with your human resources department or make some discreet inquiries.
2. Test the waters. Don't jump headfirst into an office fling. Take time to weigh all considerations and possible consequences.
3. Establish some ground rules. Talk to your partner early on about how you plan to handle the relationship and what you would do if things turn sour. Make sure you're both on the same page.
4. Be considerate and professional. Even if your co-workers are accepting of the relationship, no one wants to see public displays of affection. Blatant flirting or physical contact could make you fodder for gossip, too.
5. Stay focused on your job. Being in love is distracting. But don't let the relationship detract from your professional responsibilities.
6. Don't play favorites. Of course you want to protect your loved one's interests, but don't let your bias seep into the office. Consider avoiding tasks where a conflict of interest might develop.
7. Be honest. No matter how cautious you are, the secret's bound to get out. Be prepared to confirm the rumor and plan on telling your boss that you will keep your relationship professional at work.
8. Proceed with caution. Lawsuits and sexual harassment issues are always a possibility if the relationship creates a hostile work environment or causes discriminated or special treatment of any kind. Be extra cautious if you're considering a romantic relationship with a boss or a subordinate. Many company policies specifically forbid liaisons between upper- and lower-level employees.

Source: http://www.azcentral.com/ent/dating/articles/0629officeromance29.html