Everything started when I finally got in high school. everything was just fine... I guess. but the problem now is that my grades are getting lowe I wasn't part of the honors anymore and my personality changed to more like a rebel.

I thought it was normal like many teenagers face when facing high school but now its different.My mom and dad began lecturing about values and all and I get it but I still keep on rebelling.

Even in my past it was like this but not much, like at the past my grades are just plain or above average, I watch anime or cartoons at the computer or TV during school days and still the same now.. but I can't identify what's wrong with me...

And now in high school I've encountered more problems... I'm the class president,yes that is something to be proud of of but the problem is that I was never been president before in my life before and now more problems arise.

my boy classmates are acting like complete jerks.. to be honest.then the girls,an all-out war.then the next thing is that because of the stress... it developed asthma attacks or just hyperventilating,pains in my chest or hearts numbness of muscles.

but the worst of all to me is that even though I have my old classmates still with me in my current school... I become depressed or even cry if I remember the memories I shared with my past friends.they're all still my friends but we're all separated and I can't keep in touch with them always... I miss them so bad I cry just thinking about it.

I don't know what to do anymore... please someone help me..

How on earth did you get to be class president while undergoing all this? Didn't you have to run, campaign, not to mention be popular?
Anime and cartoons are fine in moderation. You could have a career in one of those areas. One of my favorite movies, 300, is based on a graphic series, cartoon, of the same name. But don't just escape to a younger age in them.
Somehow I think you are going to be OK. High school is misery, plain and simple, for most of us, and I was top of my class and president of this and that too. It's just that horrible wasteland between childhood and adulthood, when parents seem oppressive and still powerful, and yet we know we will be out in the world and on our own very soon.
I turned into a rebel of sorts too.
Crying about old friends, and hyperventilating and getting asthma attacks - that has me concerned. You may have to ask your parents to let you see a therapist. Ideally you have enough new interests in life to keep you busy, such as hobbies related to what you are learning. Anything from science projects to writing a book drawing your own anime to building a table to souping up a car.