It appears that you and I have some very similar life characteristics. As far as the social thing. And self persona.
I used to let it get me down for a long time. But being different no matter how great or small is not a bad thing. So you're a diamond in the rough. So what!, don't be one of those regular people who have real insecurities and want's to be like everyone else who is really a nobody inside.
There's nothing wrong with being your own person, not a damn thing wrong with it. It's just socially drilled into our brains that we need social interaction with others to survive, no matter how superficial it may be. People are not raised on their own thoughts any more. It's all from hear-say or the boob tube!
As far as the girl you believe you'll never have. Your insecurities are probably scaring her away. You can't take care of others until you learn to take care of yourself. Just be yourself. And even you think or believe you don't know who that is. Just live life! Do whatever makes you happy, then you'll be ready to make other people happy.