As I mentioned last week, we spend more time at work than we do with our families. It stands to reason that, just like your family, there will be people that you like and 'just click' with and then there will be others you'd rather not see sitting across from you at the Thanksgiving table. Plus, there are a boatload of people in the middle that don't elicit strong reactions of any kind.
Your Work Bestie
You eat lunch together. You exchange emails all day. You hang out after work. They know your family. Most importantly, they know all of your business. This is your friend and if one of you left the job the friendship will continue. Yet, this relationship looks different to outsiders who might see that kind of closeness as unprofessional. If one of you gets promoted, people will be looking for favoritism.
While breaks and lunches are your time, in other areas and at other times (during meetings, training sessions) try to keep the camaraderie to a minimum. These are not the time to share inside jokes and tales of your weekend escapades. Keep those between the two of you and off of the clock.
Your Work Frenemy
This person rubs you the wrong way. You dread even passing them in the hall. Yet, there will be times when you have to work with them. Keep it professional and respectful. Don't complain about them to other co-workers (including your bestie). Watch your body language in this person's presence. Other people notice the frown, the sighs and the eye-rolling.
This is work, so let's keep it about the work. This one could be difficult though depending on why this person is a frenemy. If the person is a work-avoider and constantly pushes their work on you and others, make their role clear and get their buy-in in writing (email) so their responsibilities are clearly defined. If this person is condescending or a hot-head, do not back down. State your position but do it without getting emotional or frustrated (that is often the reaction that person is looking for)
These people are not the Bestie or the Frenemy and these are the majority of the people you deal with everyday. They watch your relationships with your Frenemy and Bestie. They are there for small talk and chit-chat. While they might not even be a blip on your radar, these are the people who determine what your work reputation is like. They take note of your frustration with your frenemy. They overhear the personal conversations between you and your bestie. They are a silent majority.
Be courteous and professional and focus on doing your work and doing it well. Don't give them any reason to question your work ethic, your integrity or your professionalism.