Christmas, boxing day and being excluded

Well I here I thought I could manage this tume of year, thought I was ready, thought I was prepared.
Christmas lunch was held last week for my mum, dad two sister's and their respective families. It was nice catching up with them but also difficult, first xmas with no family of my own.
actual xmas day was even more draining but managed it okayish.
boxing day floored me, I have a good mate whose birthday is on boxing day, tradition is bbq and drinks, I was invited but couldn't go as my ex wife was going to be there and her cousin is staying there. .... most alone I have felt so far. Now there is another bbq and drinks day tomorrow which again I can't go to as my ex will be at that one also.
Everything has been denied for me, can't see my friends for the support I feel I need the most I can do is escape from my parents on the road for a drive through the hills, I am feeling so sad and let down by those I call friends.....
I know that my plans for travel is me separating from everyone that I know but it still has me pained and hurt and feeling very alone. Now I am expecting my new year's eve get together with another mate will fall through.
I can't wait to say goodbye to the worst year of my life and start a fresh next year.
this will be a very difficult next few days
does anyone else get the same or been through similar?
What has helped you through if anything?
I just need some tips to help me
thank you