I have been told that this is how it is for everyone.
Socialising with another couple, we sit down and DH immediately starts a conversation with the man who is his friend while me and friends wife start chatting. But that was how it was for the rest of the night, Two separate conversations. I tried on a good few occasions to draw a common topic and get all chatting but DH at the first opportunity turned back and starts the one on one with his friend.
He thinks IABU to expect us all to chat and this is how it is.
He has form for it but we we are usually with mutual friends who naturally bring the conversation back to include everyone despite DHs best efforts to segregate the group.
If he wanted a night with his friend then surely he should have done just that. It was actually a very awkward night for me.