Ex and I split 2.5 yrs ago.
Most of our friends were “my” friends and I was the one who made all the arrangements for socialising. He became close with one of my best friends husbands, child and her tbh. We used to socialise with them a lot and often spent NYE with them.
Ex was physically, mentally and verbally abusive to me, and he cut out most of my family and friends when I left.
These particular friends have remained neutral (which is fine) and ex still spends time with them.
He has arranged to spend NYE with them meaning that I will spend it alone for the first time in my adult life (late 40s) as my kids are at parties, friends all doing stuff with partners or abroad visiting family.
AIBU to feel a bit shitty that after an absolutely shit year where I had a long time off due to being diagnosed with PSTD mainly due to his behaviour and I was the one who cultivated and maintained the friendships that or is me who will end up alone on NYE.
He has fallen out with most of “his” friends and his family are beyond dreadful. 😥