To add to my comment, popcorn is not healthy and should not be eaten frequently.
You both have problems.
Why do you have to have Pop corn every day?
Especially when you know it bothers YOUR FRIEND?
Friends don't do that to friends...
She needs to be able to speak freely and tell you exactly why she is upset.
She also needs to figure out why the mere aroma of popcorn makes her so sick that she has to miss out on class. That is not normal.
Iv'e never read anything so strange, shower her in pop corn. Haha
i'd get popcorn bring it to class and stare at her as i eat it like your crazy (the stare dont choke)