“The soul that is within me, no man can degrade.” – Frederick Douglas
Nobody can make you feel bad unless you give them that power over you. It is up to you whether or not you relinquish that power. In order to combat that, you must continually work on strengthening your mind and your emotions.
Nothing is bad unless you think it is bad, just like nothing is good unless you say/think it is good. If someone states something that could be construed as rude, you have the choice to let it affect you.
“Choose not to be harmed, and you won’t feel harmed. Don’t feel harmed, and you haven’t been.” – Marcus Aurelius