This time of year always feels hard because of this and I end up feeling like like I'm pretty much alone in the world, and on top of that, no one else is in this position. Which makes me feel even more alone...
I was born into a tiny family. I'm an only child, so is my mother, and my father had one sibling who never married/had children, so no cousins either and just the one aunt. Two out of four of my grandparents died before I was born and one died when I was about a year old.
Only my mother, my mother's aunt, and my mother's two cousins I never knew are still alive, of my blood relatives. My father died over 10 years ago.
I'm also single and childless (by choice) in my mid 30s now - not having kids is definitely a choice, not having a partner is partly choice, partly just how it's worked out (I haven't tried to find anyone after splitting up with my ex several years ago now, and haven't met anyone "by chance" either).
I don't know anyone else who has almost no family (left) - either the family they were born into or one they've made through a relationship/having kids. I have some lovely friends but they all have their families... Sometimes I feel completely alone in the world and no one really gets it. 
This is probably the wrong place to ask as MN is all about families but just wondered if anyone was in the same situation and how you "cope" with it?