A lot of what you wrote sounds like Aspergers. It is a form of autism that affects primarly your social and communication skills. You may want to do some research and talk about it with your family too. Sometimes when you know what's wrong, you can start working towards a solution.
At the same time, we are all so different and some of us are just more social creatures than others. Some of us (myself included) just prefer to be alone and that's perfectly ok too.