FIL, FIL wife (FILW) and their DC live around 700 miles away. Have not seen them since pre covid. The relationship between FIL and my DH has always been a bit lacking (FIL left when DH was 5 and saw him less and less the older he got). Recent years have seen each other once or twice a year. Distance obviously doesn't help but we are all in the UK.
DH had mentioned to FIL we planned a weekend staycation next month close by to him and arranged to spend the one day of our trip with him+FILW and DC. FILW has now informed us they have a holiday booked at that time and won't be able to see us.
DH and I got married and SIL gave birth during covid. Her baby is now 1 and never met FIL (babies DGF) nor FILW+DS. Its a bit stinging that his and FILW priority was a holiday, over visiting immediate family who have celebrated significant life events.
DH has pulled FIL up a few times about his lack of interest pre covid. Things pick up for a few weeks and then fall away again. I don't know about SIL but DH could definitely make more effort so its not totally one sided, but it seems like FIL has his new family and just isn't that bothered. FILW has openly said that whilst she is happy to be a part of the family dynamic, DH and SIL are not a priority for her.
AIBU - keeping plugging away and trying to keep contact for DH/family sake.
YANBU - FIL is selfish and won't change.
I am sad because DH and I hope to start a family soon and I don't want FIL to be involved with the baby if he won't make any effort and don't want the baby to grow up to know they have a DGF who basically doesn't care. I appreciate the distance is an issue and we won't see them every weekend but its not like they are at the other side of the world.