Stop assuming things about people after reading a single comment. I am not an extravert. The reality of it is - completely ignoring and not talking to your coworkers is weird. Even if you don’t like socializing to a fault, it doesn’t mean you behave like a weirdo when someone engages you in simple conversation. Also, since they are a nurse, they’ll be the same towards their patients? Where is the limit? Bedside manner is important and so is interacting with the people you work with.