I'm thinking about the time a fat guy fat shamed me
What did he do?
He called me fat in front of many people.
You have the right to be upset if someone publicly embarrasses you. You should move on from the past and not let it bother you.
I know, but I just can't help thinking about him.
I think you just have to realize that some people are just rude. If you accept that, you'll move on quicker.