Go for it! There comes a time, after you've "helped" & "helped", that you
need to take care of yourself. Meeting your own needs for a environment
that's condusive to teaching is not selfish, it's just healthy. Yes, we
feel guilt when we walk away from the crazier things (& people) in life
that we'd like to "make better". Sometimes, it takes someone else with a
fresh perspective to do it. Meanwhile, you can be growing in new ways &
rediscover the joy of teaching.