I don't socialise. I've always been uncomfortable is social siutations. I don't know what to say and feel uncomfortable when saying anything.
What was worse, when I was younger and thought I had made a connection with someone, socially, they generally gave me the brush off.
There is nothing wrong with you. There is no rule that we must all socialise.
You live accoding to basic human decency. Avoid dishonesty and conflict. Eventually you find your place in society.
Your question, what is wrong with me, I wish someone would just say it, rings a very familiar note.
There is nothing wrong with you. You are you.
Cindy points out that we have social problems. The years between being children and adults, when we learn how to socialise, most people are concerned with appearing normal. Being different means not being part of the group.
My wife is an interesting case. She has no close friends either. But a huge circle of casual friends, many of whom regularly invite her to dinner, to wander around shops and such. Yet all of these contacts have been built up of many years. I am pretty certain, all of her contacts really like her. She is very likable. Yet, to their oter friends, I dare say they would imply they are acting out of kindness. Certainly, they rarely ever invite her to be with their social group.
Also, if she was in real trouble, I wouldn't like to think she would need to rely on them.
But she takes each of them as they are, as she does with most people. She doesn't expect more than they are likely to give. She generally accepts when they let her down.
At the end of the day, it's about you building your own life. Making your own arrangements.
Quite frankly, people like us, people who were born like us, need to stand on our own two feet.