What I need

I need to get thicker skin. It's like everything that anyone ever says just sticks to me and I think about it for days and days. Not to get into too much detail, but I am so sensitive about what I do and if someone critizes that or is unhappy with the job that I do I really get hurt. And with teaching, often the measure of success is a matter of opinion. Is success having students remember everything you taught them or having them remember you as a good person? Right now I don't know - honestly this has been one of my hardest years because I am letting others define my success, but really I am having trouble trying to define it myself.