DB is 2 years older and my only sibling. We have never got on - very different personalities. He has always been the "cool" one and looked down on me for being quite homely/boring, and spent a lot of my childhood sneering at me and putting me down. After leaving home we no longer fought but just got on with our separate lives really. We now live about an hour away from each other and each have children of a similar age (4-8).
We are now on civil but distant terms - e.g. text every couple of months, usually around kids' birthdays to ask what they want, but only see each other 2-3 times a year. I usually come away feeling a bit crap - although he's polite, it's clear that he doesn't think much of me and DH and has little interest in spending time with us. His wife is a bit nicer but spends most of any visits on her phone.
Things have fizzled further and I haven't seen him for 6 months now. I don't think this will change unless I instigate something e.g. invite them for lunch.
I've accepted that we are never going to be more than polite acquaintances at best, but I feel bad that I'm not getting to know my nieces as they grow up, or that my son won't get to know his cousins better.
Should I make more effort? Or just leave things be? Just wondered if I am alone or whether anyone else is / has been in this situation.