Most Helpful Guy
Look at it this way :
Girls you described are what attracts most guys. That's absolutely true.
Now, if you're not like those girls, you're different. Maybe there are quite a few girls like you around, probably not at your school. Because that's how the majority of people are; "conformists".
Get rid of the idea that you're unattractive out of your head right now. Yes you're get unnoticed. Why? Because you're surround by attention whores. They purposely wear skanky clothes and so much makeup to get attention.
And who exactly do you think they get their attention from? Or rather, whose attention are they looking for? Their male equivalents. And you don't want to get those kind of guy's attention.
You see, you are a rare breed. You live around people who look and dress the same, listen to the same music and only hang out and like each others. You have to look for people like you, who DO have a personality of their own. Those are the kind of guys you want to look for. Problem is, there isn't as many of them. And they don't always seem as attractive.
Another problem is, those guys might also be attracted to those girls. Because you see, guys are retarded most of the time. "Conformist" girls aren't considered pretty. Or if you put it this way; you'd be pretty too if everyone could see your breasts and your butt... Get it? You could be really unattractive, as long as you show as much of your body as possible, you'll get attention. And that's what those girls are doing. And please don't do that.
Those girls will get ton of attention, adventurous sex lives and plenty of relationships and experiences. Then when they're past that age, guys will lose interest into them and look for girls like YOU. (Or if they're THAT kind of guy, they'll look for girls that are the same age those girls they lost interest in were a few years ago!)
The sad part is that if you're looking for a special someone, you'll have to wait. The only thing it means is that you've matured earlier. You can either find a guy that's also mature (hard to find) or simply wait... Because at your age, this is mostly all you'll get.
But don't, DON'T try to follow the crowd and become like every other girls. You'll get attention but it's not going to be worth it. And the attention you'll get is not the kind of attention you're seeking. Those are couples that don't last. You're never going to get into a serious relationship like this.
Don't change. Stay the way you are, for those special guys out there who are looking for someone like you. I can guarantee you that there's more guys around you who would dream to be with you than you might think. You probably just aren't looking at the right people.
Remember, you ARE beautiful and you don't need to change. Just be patient.