Maturity is not measured by age, it’s an attitude built by experience.

Here are 10 traits of a mature person.

Comfortable being alone: They are comfortable being on their own and don’t always need friends or people around them.
Accept differences: They accept that everyone is different and will have different opinions. They don’t need everyone to think or act as they do.
Emotional Independence: They are not dependent financially or emotionally on their parents. They tend to make their own life decisions.
Treating others right: They don’t put someone down or make fun of someone because that’s not how they get their self-esteem. They are already confident in themselves.
Taking responsibility: They don’t blame others for their failures and try to take responsibility on how to improve the situation rather than complain.
Listening more than talking: They have two ears and one mouth and they use them in that proportion.
Honesty: They don’t try to deceive or manipulate others for their gains. They lay their desires on the table and it’s okay if other people walk away.
Mature conversations: They like to talk about deep meaningful topics about life and nature with a sense of wonder and curiosity.
Never clinging: They don’t emotionally cling to people and if someone isn’t the right fit for them they aren’t afraid to let them go.
Not chasing: They don't chase money or that new car or someone,they know where true happiness is; in the present.