My lord this cuts deep. Bonus points if you approach your interests in a way that nobody else seems to, leaving you feeling even more disconnected and alone when you're around people who share them.
I've been wrestling with this since (dropping out of) high school, I'm in my early 20s now. I lean towards embracing my idiosyncrasies and letting go of attachment towards getting the kind of social fulfillment I want. Ask me on a different day, though, and the siren's call of having a 'people' is too strong to pass up.
I like to think that learning to just be authentic to myself leads to both in the long run - if I can find a way to be okay with being alone, I'll be in a better place to reach out when the time comes. Still working on the first part of that hypothesis though.
Would you be interested in chatting more about this sometime? Shoot me an email, sheyaway at outlook.