Dp has 10 nieces and nephews ranging in age from 10 to 25. We all live very close to each other so I regularly bump into them whilst on tge bus/train or at the shop.
They at best nod their head at me but normally they just walk past me. They do this to other family members to, I was out with ds's godfather ( the nieces and nephews great uncle) he is lovely and tried to engage one of tge neices in a conversation whilst we waited for tge train, she sneered and walked away, he was quite upset, he has teenage kids himself who are very respectful and friendly.
Ds is 8 months old now so he pretty oblivious to tge rude attitude but I am not looking forward to him realising that his cousins wont even say hello to him.
The thing that really annoys me is whenever one of the neices or nephews has a birthday all the extended family are invited by text saying "dn is turning 17, they would like money as a gift as theywant a new phone/computer/iPad" I think if you don't care enough to say a friendly hi, how's things? To people don't invite those people to your birthday party?
I'm in my mid 20s myself and most of the nephews and neices are only a year or 2 younger than me.
Aibu to think it is rude not to say a cheery "hi" and smile when you see a family member?