My friend is in college and I'm a flight attendant. I have a bachelor degree. I love my job, but my friend keeps saying stuff like "oh so what did you serve today?" in a very condescending tone. I went through a very tough training where I learned how to deliver babies, save people with heart attacks, evacuate 500 passengers in less than 2 minutes, confront hijackers, etc. I'm not just a waitress in the sky. Every 6 months I have to pass very difficult exams in order to renew my license to fly. It really hurts me when she makes fun of my job. What should I do?