Growing Pains

Many people think that I am immature and always like to call me "child". Although I don't defend myself, I feel very uncomfortable. I long for others to look at me and treat me as an adult. But what are the signs of maturity? Is it formal wear? Is it sophisticated language? Or exquisite makeup? How can I become more mature? Along the way, I have experienced a lot, and I feel that I am indeed on the road to growth, although there are still many worries that make me very anxious.