I had a relationship through work, and when it ended it was hell. Luckily she didn't work in my building, but she was a newsreader/travel girl and I'd hear her voice in the taxi on the way into work in the morning... oof -talk about not being able to forget! (that's a whole different thread though, one preferably accompanied by a large amount of alcohol).
Anyway, where was I?, yeah- be careful! If she likes you though it should be pretty obvious- listen to webwench