Is it normal to never smile?
Depends.It depends
Some people naturally smile very little, and that doesn’t mean anything is wrong with you. If you used to smile or enjoy things and that’s changed, it may be worth paying attention to how you’ve been feeling.
Yes, some people have a naturally serious or neutral expression, or simply don’t smile much. Smiling is a social habit, not a requirement—and your face doesn’t have to advertise how you feel every minute of the day.
If you mean you can’t smile anymore, or you’ve stopped enjoying things you used to enjoy, that’s a different story. Stress, sadness, or feeling emotionally worn out can show up that way. If it’s a new change or it’s bothering you, consider talking it through with someone you trust or a health professional.