How to act more mature?
You dont act like a kid, you take up for yourself, you don’t let anyone tell you how, or what to do in your life. I myself think of bring a mature 19 year old, I don’t act stupid just to get attention from others, I just act how I want, I don’t act like someone not my age. You just have to get over the fact that not everything is perfect in your life, and just go with the flow of things “so to speak”. I’m not real sure of how else to explain this to you.
if you have to ask…im scared. go to an ettiquite class and learn a few things to be polite, i would suggest surrounding yourself with people who are mature rather than the ones playing in the sandbox or playing with spitballs and such, learn some new vocabulary, study more subjects on your own time to become more knowledgeable, travel the world and learn how not to offend different cultures, or just wait until you realize all those times you acted like a little kid when you know you shouldnt have.