Dr. Joy Bliss writes at Maggie's Farm about building communities.
There is a basic human need to be "in community," to have human connections of all sorts outside of family. We are tribal creatures.Read more here: http://maggiesfarm.anotherdotcom.com/archives/21164-Lonely-at-Christmastime,-with-a-comment-about-circles-of-connection.html#extended
If they don't love me, it's their loss but maybe mine too. Rejection is just part of life, and many people seem to feel that they already know enough people.
One reason to hold a Christmastime party, or any get-together, is to honor, or acknowledge, all of the people who are part of the fabric of our lives in some positive way.