Boyfriend doesn’t see the point in friends

So my (24f) boyfriend (30m) and I are currently living together. We have been together for 10 months and he’s in the process of getting my ring. Well today he asked me why I sometimes ask other people in my life (family, best friend) for advice or ask them about situations/explanations of things within our relationship. For some background: I come from a very religious household and he and I are both Christians. I was raised where community and going to others to get wisdom about things and understanding was very normal. I have a close net of a few friends. My brother (due to my dad not being a safe person) is also a spiritual authority to me as is my step dad until I get married to my bf. For more context I am divorced from my first husband who was not a Christian but I do have a son from that relationship.

Well, all of this led to me getting extremely upset and scared for our relationship because he doesn’t see the point and really just doesn’t want anyone to know about what happens in our relationship and he wants to be extremely private. I tried explaining to him that as humans and even biblically, we are extremely social and we need at least 1-3 close friends to confide in and have even just to “check” us. He says he has me and he doesn’t need anyone else. I don’t really know what to do.

What sparked all of this is that I talked to my brother earlier in the day about a video I watched asking for an explanation on a subject I wasn’t very familiar with. I later took the topic to my boyfriend and gave my opinion and he didn’t understand why I would ask my brother instead of him when what I asked my brother about the subject it wouldn’t be anything that he could’ve even answered.

TL;DR: boyfriend thinks just having each other is enough and we don’t need friends/family to talk to about anything since we should only talk to each other.