Beebop79,
It’s sad when this happens & even worse when you have no idea of the reason . It is bad manners for your brother not to respond to even one message that you have sent .
You often find in families ,no matter how large or small that some members ( maybe one or maybe more ) will effectively cut themselves off .
It could be the GF/ Wife/Fiancé who has the say over this sadly .I know of instances where (the) DH stopped DD having all contact with her family which meant that GP could no longer see the GC they had been close to for 5/6 years & the next GC has never met them.
Another ,where the partner of a family member has more or less done the same , where bd cards would be exchanged that doesn’t even happy these days .
Do these come under cohesive & controlling behaviour, certainly the first does , the 2nd is more of a we are too good for the like of the rest of the family.
Very sad for both these families. I don’t think it’s a case of move on like others have said . Your Brother may at some point make contact of his own accord. Keep his phone number in your phone & continue to send the cards with a heartfelt note ❤️
