I am sorry snow, but I am sure that many many people feel the same, it just seems worse at Christmas because of all the hype and pressure to be a perfect family. In fact, New Year is the peak time for people separating and seeking divorce, which says it all really.
There has been a lot of mention of friendships but, in my opinion, they take a long time to grow properly if they are to be deep and meaningful. There are people you can meet and strike up an instant relationship and socialise with, but the rare flower is something which has been tended and watered over the years. I think we should never give up on friendship if it doesn't deepen immediately, but just hang on in there, try to be proactive without being pushy or needy.
I have no advice beyond that above, except to say maybe embrace it, wallow a bit, buy yourself some delicious things to eat and drink, enjoy the solitude and the fact that you can please yourself, watch some tv or listen to some lovely music, and focus on the fact that it will be over in the blink of an eye. Then resolve to make things different for 2019.