I saw an interview with Anthony Hopkins, and he went into detail about being a loner, the same as he describes it in the text here
It really struck a chord with me.
I like people, and can have a really good laugh at work, but really can't be bothered to go out socialising. DH works abroad from time to time, and if I'm off for a few days, and have contact with no-one for 4-5 days apart from a phone call or two , it really doesn't bother me. Being bullied very young is possibly a factor in that from a young age, I was very self sufficient emotionally. I like my own company, and really wish I had more hours in the day to do all the things I want. Read, do arty crafty things, watch films, doing some voluntary work and telephone counselling a couple of times a month. I like coming on here, reading what people have to say about different things, sometimes joining in.
If I wanted to go out 4-5 times a week, I could, but I'm incredibly picky about people I want to spend time with. I can't bear negative people who constantly complain about the smallest things. And I don't like those who bitch about others in an attempt to make themselves appear superior.
I like pottering around and I'm 100% happy to do that. I don't need the attention of others to feel good about myself.
So OP, good on ya! If you can tell yourself you're happy, and you treat others with respect, the only person you have to justify yourself to, is yourself.
Lots of people like being surrounded by friends, good on them too! No one is right, no one is wrong. YOU are the most important person in your life, and to know what ticks your boxes, and live your life accordingly is the biggest thing you can do for yourself!