Are people really scared of intelligence?

OK, I’m not trying to brag, just bear with me.

Around my school I am generally seen as “the brains” or the geek, the tech guy etc. Teachers always ask me for help with computer problems, and people ask me to fix/mod things. I answer most questions in class, often extensively, and bring up points during a teachers lecture.

Anyway, people say that it’s scary how smart I am. Often they laugh a little, but sometimes when I am answering/have answered a question people actually look nervous, and they look at me funny, sort of with that fear/respect that animals have for pack leaders. Anyway, why are they doing this? It is actually really bothering me. I try to explain that it’s easy, anybody can know the stuff do, but it doesn’t help. So, are people genuinely afraid of me, why do you think they get nervous, and how can I stop this.

I think this has also affected my being able to make friends, I have had people talk to me, and after talking for a while they avoid me from then on. It would be nice, because I might be able to make more friends. Not because I need friends, but I understand that social interaction is good for you.