hey..I guess you gotta be expressive & show that not everyone knows everything. There may be areas which you are more intelligent in - show it. it's all about actions. She may not be exactly jealous but she's just a snob. Someone who's competitive, one who must win in all situations. You are more like her opposite, that's why she only has you as her friend - you give her a sense of victory. I think u should try & get her to appreciate other friends/people around her. Have a break from her some times, please. Take care