O.K. - this is just more plain ole' fear. Fear just keeps popping its head in everywhere. Yet again, it's the fear of social rejection.
And putting on physical "armor" or carrying a defensive weapon like wasp spray won't conquer this fear. Still, I've seen some of you strap on that "shield" of trash talk, thinking that will protect you from any prying questions. Or, your defensive weapon may be your reputation for picking fights of the physical or verbal nature - to punish someone who suspects your secret. It could be that you've just gotten into the habit of privately picking apart every person you get closer to. After all, if you convince yourself they're not that great anyway, you won't feel so rotten when they walk away.
I'm telling you - this rejection game is a game you will never win. You want to stop playing this game. Chances are good that this new person may be a person who will help you, not hurt you. This person may tell you a joke to make you smile. Or this person may be amazed at the landscape you just painted. Or this person may invite you to a party. Or this person may pray for you.
Break this habit of brick-walling yourself inside. Start noticing what are the tricks you play to push people away. Stop demanding that everyone around you be a super-hero. They don't have the power to repair your world, but they can keep you from fighting it alone - and that makes them special.
But first you have to learn to welcome their company. Look around - what do other people do to reach out? Do they give compliments - do they go sit by someone who's alone - do they offer a helping hand - do they ask how did you do on the test?
Take mental lessons on how to invite other people into your world so you can stop kicking people out. You'll be glad, someday. You may even get close enough to somebody to find out that they had an issue they feared you'd reject them for, also. You may find out you're not as different as you think you are, after all.
You will feel "connected" again, one of these days! Keep holding on to that hope.