I'm one of the young people myself. I reached 20 in october. But I don't think like all those young people. I embrace oldies music and I love hanging out with people that are 25+. All guys I've dated are 24+. I find young people hard to understand. I also don't use lots of "0.0
"s or things like that in my typing.A guy friend of mine says I have the mind of someone who is 25 years old. Is it normal or should I try to fit in?
"s or things like that in my typing.A guy friend of mine says I have the mind of someone who is 25 years old. Is it normal or should I try to fit in?

You are who you are, if people that are older than yourself gravitate towards you then great. However, listening to oldies music and not using emoticons do not necessarily make you mature.
In my opinion, what makes someone mature is how they operate under situations, stressful situations, gossip etc - are you tactful. Also being true to yourself, letting go of anger/resentment, not letting other people affect your mood or your decisions. Thinking for yourself and recognizing and abiding by your moral beliefs. Understanding the impact that you have on the world and using that responsibly. Constantly trying to grow as a person.