<human>: Summarize the given text in a few sentences.

A lot of people seem to like me, and they say it often. But every once in a while, I'll see someone say something very mean about me and it affects me a lot more than it should. I know that there will always be people who don't like you, and there will always be people who say things behind your back, even things that are untrue. But I don't know what to do or what to say to myself to make my brush petty comments off.

Example: Today someone commented about me to a friend on a public forum that I was a self-righteous jackass in high school.

That was 7 years ago. This guy tried to bully me in high school. I should easily be able to look back at it and say I can name countless people who would say the nicest things about me in high school, and that this guy was just jaded and jealous. But for some reason that alone isn't helping.

I'm tempted to say something back at him, but I don't think it's worth it.

Can someone help me get my mind straight? Better yet, what can I tell myself to get accusations from people to run off my back? I know as an aspiring leader that I have to have that skill, but I can't figure out how to do it.
<bot>: A lot of people say the nicest things about me, but one person's criticism can easily tear me down. Should I ever publicly respond to their criticism, and more importantly, how can I ignore the criticism?