I occasionally freelance in drama classes in high schools. I only went to HS for a couple weeks myself, and didn't realy know what was going on in there anyway. It was quite eye opening.
Guys run around like dogs chasing their tales and occasionally punch each other or laugh at each other. Some girl will give one of them some kind of attention. He will follow her to see if she has any interest. She will play with him for a while, confuse him and send him back to the pack. He will stand there perplexed till someone punches or laughs at him and then he goes back to barking.
I think the guys assume the girls are doing some female equivalent somewhere else and enjoy watching them without ever really thinking about them in their social context.
While the guys are acting out, the majority of girls are running strategy drills on each other. There are a few who don't participate at all. The rest move about in groups of 2 to 4 and try to give specific targets eating disorders or permanent psychological damage.
Find a place amongst a large group of your fellow classmates. Sit in a corner and try to appear to be reading. Ignore the guys. Ignore any noticable physical attributes the women you are studying may have. Watch how the women act. At first glance it looks like they sit and talk to each other, get bored, split into new groups and join another individual or group. Keep watching and you will see more is going on.
There are girls who think they are in control, girls who are in control, targets and guys are often little more then collateral damage.
It will give you a different understanding of what import is attached to talking to a girl. If you seperate yourself from the dogs and approach the girl in a way that lets her know you know what is going on, you are not easily confused and you will decide what happens next you will shake her from her perch.
Downside, is she may not be able to handle it and she will spread nasty rumors about you. Upside, if they've noticed you they have already spread nasty rumors about you. You have a better understanding of the mindset behind these kind of rumors. You will understand that by knowing what is going on you will disarm the power of the rumors. Hopefully, you will realize the girls who fully participate in this drama are not worth your time and will focus on the others.
You might learn something very different then I did. The important thing is to go study their style of interaction. I guarauntee you will learn something new.
When girls in HS say girls mature faster then boys it means they learn to hold grudges longer and exact more intense revenge.
There are exceptions, and the exceptions are the ones you want to find.