Paul says in Romans 12:18: "If it is possible, as far as it depends on you, live at peace with everyone" (New International Version).
Even if you were not the one to start the fight, you can be the first one to end it. Apologizing for whatever you might have said or done wrong, and then striving to do better, helps enable you to "live at peace with everyone." Be an example to friends, family, and co-workers in this area.
Kindness is contagious!