Colleagues spend much of their day in the same place, working on tasks together, reaching shared goals together and falling short of them together. This forges bonds. But what happens when you fall for one of your colleagues? Should you keep your feelings to yourself or open up to your heartthrob? It depends, says psychologist and career coach Madeleine Leitner. If you’re both single, there’s no immediate problem. But if one or both of you are already spoken for or, more importantly, married, the situation can get tricky fast, particularly if one is the other’s superior. It also depends, Leitn…