How would you guys feel or think?

My boyfriend basically had only 1 real bestfriend growing up and for the past few years they have drifted apart and his friend doesn’t have kids and just a different life style.

Me and him have been together 5 years, one child together and he’s the step father of my older two kids. Anyway, his bestfriend recently got engaged to this girl and they set their wedding for next June. He got the invitation in the mail… but a few months back the friend texted my boyfriend asking him if he could go and be there. the thing is he only invited my partner to go but not me? Even in the texts he said “ can you be there at my wedding? I asked my partner like… it’s kind of weird he didn’t invite me even though we are together and been together for so long and have a family? Ive never met the guy or anything but just being I guess respectful ID assume he would invite me with my partner? Like and my partner said “ I’m sure he assumes your coming since we’re together” I’m not sure about that or I feel like the guy would have said my name with it or something but he was specifically asking for him. Didn’t mention me being invited. Maybe he is assuming but I don’t know and my partner isn’t gonna ask him and clarify he’s just saying for me to come cause the friend is probably assuming I would go with him. Hm

Also, his friends fiancé has added my partner on fb and my boyfriend likes their posts all the time but his friend and the fiancé never like my boyfriends post of me and the kids. It seems really weird. Like I feel like the 3 of them are cool but I’m not even here. Like my boyfriends cool with his fiancé but his friend and the friend fiancé has never acknowledged me like our whole relationship. Idk seems strange?