I know many people find Christmas lonely: I know because Ray Hadley on 2GB radio said so.
For a Christian within a more 'traditional' congregation, Christmas is a time of high activity. Indeed all of Advent is a special season.
A local church for me is quite busy over the lead up to Christmas:
If you want to be really 'pointy' Christ Church St Lawrence will keep you busier than a bee on a honey drive (they are also a little naughty referring to the Eucharist as 'mass').
Now, this might not solve a loneliness problem, but it will keep you busy, with people (if you want to chat all the better), and one hopes thinking of others rather than self.