Should I be afraid of him,or not?

I have a friend,his name's Nicholas.He apprently,can speak to the dead.People at my school avoid him,and he's an out-cast.I used to hang with him alot,but he freaks me out.I seldom hang with him.And when Im in the mall with my friends,and they see him.My friends go elsewhere,and i go and talk to him.And what makes it more wierd,people come up to me and ask me to ask Nicholas to talk to thier dead,mother,father,sister or relative.And they hand me trinkets like,necklaces,dolls,baseball cards etc.And sometimes Nicholas is 100% accurate.Should I be afraid of Nicholas.Is he working with evil,since he's accurate (IDK where he gets his info from.).And should i keep away from him permanently?