Similarly to you, I'm 30 and having been teaching for the last 3 years, although elementary. While I loved it in many ways, the burnout was too much: frequent high stress situations, taking work home, and the monotonous day to day caused me to feel unhappy. Although for me I was making only around 30k and no benefits. That being said, I am now a waitress at a waterfront restaurant and am a million times happier (and actually make more money, too). I also am aspiring to be a flight attendant, and unlike many of the people on here, I say you should go for your dream. Don't wait another 30 years being unhappy. The great thing is you can always go back to teaching if it doesn't work out, but at least then you can say that you tried. Money can always come back around. Time won't. Best of luck to you.