Bast, don't do it man. It always ends badly. Not only do you have to spend 40 hours a week with her when you tire of her, but you're probably going to ruin any chance of banging the other hot chicks in the office. Bang as many of them as you can, but don't "date" any of them. If you absolutely must "date" someone you work with, try to convince her to keep it secret from everyone else you work with. That's the only chance you have of making it work and even then it's a bad idea.