I've broken many rules when it comes to love. I've dated a close previously platonic friend despite warnings that a messy break up would ruin a beautiful friendship. I've dated a colleague or two, regardless of the conventional wisdom that warns against it. Etc. I agree with The Commuter-When it comes to workplace romance, if the mutual interest and chemistry is there, I say go for it...because it's better to have an awkward or uncomfortable collegial relationship with an ex than wonder "what if" you would have pursued the prospect.