As social creatures, we are concerned with whether or not we are liked, appreciated, and respected by those around us. We often jump through hoops, hoping to please everyone, including some enemies). We try to say the right things and laugh at the appropriate times, all for the sake of winning approval. The approval of others has become a big social priority and controls many of our actions.
The reality is simple...not everyone is going to like you...it's ok, they don't need to...