Me and partner have separate groups of friends as well as some mutual. For my group of close friends, he gets on well with them but has started messaging one or two of them without me knowing and then randomly says at some point 'oh yeah, she said she could help with that bla bla' - so I say, oh I didn't know that and then he looks at me blankly and doesn't know why I feel weird about it.
I can't articulate why it bothers me as I love that they get on and I know it's not particular flirty or anything like that, but I wouldn't message his mates without him being on the message, or if I did, I'd mention to him first that I'd message them.
Again, I'm not sure why it bothers me, but that maybe I feel left out that I don't know stuff when they're my mates?
AIBU?