I had a situation before where one of my co-workers were very rude. They weren't really friendly at all. They wasn't easy to talk to. The way I dealt with that, I just kept the environment professional, extended my kindness, and made sure that no one was left out, just if that meant still communicating with the individual with work, involving them in the work activities, keeping them up on email updates and anything like that that pertained to the job, and the biggest thing of all was not taking it personal. Not everyone is going to be easy to get along with, so the biggest take on that was not taking it personal and just keeping the work environment professional.