Okay, be a diet failure. That's a good start. And yes, I am serious. Diets will make you gain weight faster than if you did nothing, not to mention the emotional effects it can have on you and the bad habits and thought patterns it can install. So I am happy to hear you failed at diets and are giving them up. The way I see it, that is the first step to recovery.
The best advice I can give you is to just eat less and exercise more. I know it's tired and lame, but it's true. I have spent 15 years of my life and probably $50,000 total on every diet and weight loss program known to mankind. If there was some miracle cure out there, I WOULD HAVE IT. I promise you, it would be mine and I would be Kate Moss right now!
Oprah said the same exact thing, too. And she has far more $$$ than I do!
Look up on the internet what a portion size is. Print it out, put it on the fridge or wherever is convenient. Go walk in the park with friends instead of going to a movie or something equally sedentary. Put some effort into P.E. class. Take some classes on the weekend or after school that you'd enjoy, like maybe dance or swimming. See if your friends can join you. If not, make new ones! Learning how to cook will also be a very important skill in being able to eat healthy so even though it's not a physically active kind of class, I think it might be worth it. If your parents aren't supportive and won't buy you your own food, you can either deal with what you have by really watching your portions and passing on the more fatty aspects of the meal or get a part time job and pay for your own food and classes. When I was a teenager, I mowed lawns, cleaned houses, babysat and basically did other peoples "dirty work" for about $20 a job, sometimes more. On average, I could earn $400 a month under the table (as in, it's not taxed because it wasn't a regular job). Plus, consider all that exercise you could get while earning some money!
It's pretty tough being an overweight teen, especially with unsupportive parents. I was about 180lbs when I was 13 and turned 20 weighing about 285lbs. You DON'T want to turn out like me, TRUST ME. Please do something now, don't wait. If you can implement one healthy habit per week (or even per month) in place of a bad one, do it. Make it something you can stick with as a permanent lifestyle, not something temporary. If it exhausts you and feels like TOO much work, it probably is and you need to tone down your efforts to something more doable (but still challenging enough that you can continue it and still see results). I wish I would have at least started out with baby steps when I teenager. Maybe then I wouldn't have ever gotten up to 330lbs by age 22.
Ultimately, you can't diet yourself out of your weight problem, you have to change your lifestyle. Often, one habit at a time. Stop looking for quick fixes, they don't exist and may never exist. You can still live life and be a healthy weight too.It's not one or the other. It doesn't mean you'll never see a Big Mac or a sundae (or whatever your fave "bad" foods are) ever again. You just have to tell them that while you enjoy them, you really need to see other people too
. I don't know about you, but as soon as I make any food off-limits, that is when I have a huge craving for it and want to eat it like crazy. Once I realize i's never forbidden, it takes the need for it away. I caught myself the other day wanting a special food treat, and I thought to myself "What is the one thing in the world I would eat right now if I wanted it and wouldn't have to count it at all?" Ya know, for the first time ever I couldn't think of anything that was special in the least. It was a nice feeling. And I was starving at the moment, so it wasn't like I didn't really want anything! It's just that instead of battling myself and food, I'm now working with myself to get where I want to be. One day at a time, one pound at a time. You may need to do that as well at least in the beginning of your journey.