Strong-willed Aries are autonomous. Their confidence and self-assurance can give the appearance that they don't feel sad or hide their emotions.
However, everyone, regardless of zodiac sign, feels sadness.
Aries is passionate and dynamic. They typically channel negative emotions into useful activity.
As emotional outlets, they may exercise, create, or work.
Aries are self-reliant. They tend to resolve issues internally before seeking help.
Self-reliance can make them appear to be hiding their emotions, but they're only processing them in their own manner.