I think being happy is out of my comfort zone. It's easier to be miserable and sad.
Are you uncomfortable being happy?
Yes, Happiness makes me uncomfortable. I'm not good at showing my emotions.
You should practice communicating your emotions, it's a really good skill to have. Being comfortable with being miserable will only impact you negatively in the long run.
People shouldn't be happy and sad if they care.
It's normal to experience differences in emotions. But wanting to be sad because it's more comfortable just shows that you're not willing to get out of your comfort zone to experience new things. Do you really want to be miserable for the rest of your life?