Friends and community are not a zero-sum game. The more interconnected and inter-dependent people are, the more likely that everyone is going to have deep and meaningful relationships.
I used to feel much more like you when I was regularly hanging out with friends almost exclusively 1:1. I thought I was doing that because I was introverted, but realistically I was doing it because I had social anxiety. Looking back, hanging mostly 1:1 made me feel like my friends were more distant because there were so many people I didn't see for months that I always felt like I didn't really know my friends.
I feel similarly though. Social anxiety (though I understand it more now) and hanging out exclusively 1:1. Part of it is maybe I don't put a lot of time towards friends (my best friend I see once a month, the most I will see someone is maybe twice a week) and code a lot instead. Part of it is my friends just end up pretty far flung (one online, the others in person but in a 2 hour radius). I do feel like I know most of my friends well though, even when I don't talk for months. Catching up is fun.
Sometimes I'm happy with it, other times I wish to make more friends but realize it would end up destabilizing what I already have to some extent. Communities feel nice because the don't feel like a particularly "sticky" investment, and the ratio of people to time is greater, but I get less satisfaction from it initially and it takes time to build (I think, hypothesis not well tested).
I find when I focus on a group, usually it also comes at the expense of focus on the individuals, and the people feel less close. Unless I put a lot of focus on the group over time, then I usually get to know the individuals depthful enough, but not as deep if I had spent that time with just two or three of them instead.