To think I must be going wrong socially?

[SweetPea201]

I wonder if there are others like me, I suspect there will be many.
i always feel like I never quite 'fit in' socially. Particularly rubbish in large groups, I am quite introverted but do enjoy 1-1 socialising with people I am comfortable with.
I find it quite rare to 'click' with somebody and be comfortable enough to truly be myself, I have known certain people for years but for some reason can never feel quite comfortable around them, I feel like my mind goes blank and I can't think of anything to say, I find it hard to 'loosen up' and be that 'fun friend' unless I am super comfortable. I am also quite a private person and don't particularly share the ins and outs of my life, something I think holds me back from really making those close friendships.
i see other people becoming best friends, I always feel slightly jealous of those people of who lots of lovely birthday posts on social media with lots of different people expressing their love and how much of a good friend they are.
i do have a few friends who i feel super comfortable with, but it just seems like there is also someone else who is their best friend. I often feel overlooked and for once would love to be the favourite friend to just one person.
i am not sure what I am looking for from this post but maybe some solidarity from others if anyone feels this way too?

Do you have a hobby or particular interest / passion through which you can make friends? I too find it awkward trying to "click"
With people especially when I know nothing much about them except that we work in the same place or we both have a child in X class.

The best friends I have in my life are those with whom I've gone through an experience where we were both vulnerable. In my case things like backpacking, and doing a performance. Thats when you really form bonds, imo.