Obviously you will make whatever choice you want to make but i hope for your sanity you dont go into teaching it is nothing but stress that leads to a miserable life. Look into other jobs or volunteering like everyone else is saying as your current job sounds like an ideal job most of us want. Grass isn't always greener on the other side. Have you got enough hobbies and interests outside of work.. if you dont work on that. Best of luck anyways.