For me it was growing up with religious fanatic parents who taught us to interpret the “wrong” emotions as moral failings.
I don’t know where you’re at in your life. Maybe you do need to learn to control your emotions more. But also consider learning to accept your emotions, learn what they are telling you, and find a healthy way to process them.
And if you have people in your life who can’t deal with you having emotions, you may need to evaluate that as well.