Your life is very similar to mine OP.
I am single (well, seeing someone but not living together and I think I am going to pull the plug very soon as It's going nowhere).
I am 40 with no children. I am a little afraid around children. I was the same even when I was a child myself! I am not sure how to 'be' around them.
I like walks, I like wine, I have a small but lovely (mortgaged) house. I did have a decent job but was made redundant (company went bust) and am now muddling through on freelance work.
I have two parents, still married, one of whom I am very close to.
I am an only child-this may be part of why I am who I am.
I dont like groups of people and am quite nervous in group holiday situations, which I have only done once and felt really quite anxious the whole time. The person I am seeing LOVES being around lots of people-I admit I actually find it quite boring.
I very seldom fancy anyone, either!
I love books and internet rabbit-holes, I can stay up all night on a decent one. Group situations exhaust me-I teach on a Thurs and Fri and I nap afterwards as it overwhelms me even though I adore many aspects of it. I watch old TV programs, I like gardening and cooking (I am not good at the former, I am at the latter).
I take myself off to the local pub often, I do engage with people while I am there, and have some I would class as great friends, but on my own terms and seedtimes I go when I know nobody else I know will be in, and savour a glass of wine and a book (kindle or 'real').
I don't take myself out for dinner/breakfast but that's more to do with my always being on a bloody diet. I do often consider doing it!
And I too prefer my feet on the ground. I try various hobbies but with my redundancy situation I don't want to do things I spend money on now until I feel a bit more financial certainty. I did pole and adult gymnastics classes. I used to run a lot but long covid meant that has been left behind. I still try to do it but not as much.
I LOVE being alone. I need to be alone a lot of the time. I've had partners, including a very abusive one where I almost lost my life-so yes I guess I have scars. But ultimately I totally recognise that 'something missing' feeling. And I try out new hobbies but rarely get into them.
I may have missed the point of the thread, but felt it may be helpful to show solidarity.
I dont think there's anything wrong with our lives per se-just that society isn't geared toward this type of lifestyle. It's geared toward family, and people will always find it a bit odd for that reason.
I think we all need a 'thing' aside from families, that makes us who we are. But it doesn't have to be one 'thing'.