There is no need to apologize for who you are.  This being you is cause for celebration.  Perhaps you do not think or act as most
around you do.  Do you feel the need to
conform or to apologize for not conforming? 
Study this need.   The only question that matters is are you
being the presence of love, and if not, is growth occurring?  Do no harm. 
This is good advice.  The dissonance
you experience when your energy is not the same with others around you is not a
bad thing or a good thing.  It simply
is.  If you can bring love and growth
into the equation, then the occasion has served its purpose and there is certainly
no need for apology.