I am straight out of high school, but again age is relative. Some people have blissful life up until marriage and even afterwards and some people have a hard life from the moment they are born. In any case, I don’t travel now, and my friends and I don’t “go out” as much as you americans do. Israeli girls in general are known to be more mature than americans.
Seminaries often compare shana gimmel (sometime sshana bet) americans to (american) israelis coming out of high school. They are correct, and this is the basis for why american seminaries won’t accept girls that made aliyah if they’ve been here for over a year.
I don’t know where you come from but here, we don’t just have fun. Most girls pay for all their clothing starting from 10th and 11th grade, also for school supplies too. If girls want to travel to Europe, they have to pay for it all themselves. A lot of girls also are in charge of putting their younger siblings to bed, dressing them, and doing a lot more than teenagers do in the USA. Plus what is the point of having some etra years of fun? That’s not your tafkid in this world. It’s a waste of time.