One of the biggest things that has helped me in the past week is the sudden realization in my head that it's not "later" or "I'll just have this one last thing THEN I'll do it" and so on... but NOW.
You can do it. Just do it! I know... sounds harsh. I've been overweight most of my life. I've said over and over to myself "I'll just lose ten pounds" or "I'll just lose enough to fit into my "skinny" jeans" and so on. But... I'd do a day or two of stuff... or a week... my record... but because I didn't honestly truly WANT it... I never kept up with it. I guess the biggest thing is that you have to prove (to us and to yourself) that you really DO want it. Especially to yourself.
Nobody is making you, me, or anyone on here "fat". Nobody is making us fail our diets, screw up, etc. Some people might say things like "there is no such thing as failure" and "cheat meals don't exist"... and yeah... they don't. But IMHO, that's a bit of an excuse. No... there is no failure. But you can fail yourself. Doesn't mean you're a horrible person and you'll never get it right... but you'll never get it right if you consistantly allow yourself to fail. With anything. Whether it be homework and school/job related things, or with dieting and health.
I guess the biggest thing that I encourage you to do is to give a long hard thought. How hard do YOU want this? How hard are YOU going to work? Because we can give you all the advice in the world... your friends and family can encourage you and do everything to help you... but in the end... YOU are the one who makes it happen. Not us, not them.
I'm not trying to be harsh, mean, or anything. I'm simply stating what has helped me get past this plateau I've kept myself on for the past five years of my life. In the past, I've told myself "I can't do it" or "I keep failing" or "oh... I'll just have one last thing before I do this". And... no. That just won't work. I had to think... how bad do I want this? And now... looking at my photos... my videos... and more... I cringe. I'm a confident, sexy, beautiful young woman trapped in an unconfident, flabby, ugly 215 lb body. I want out. It's my life... I want to live it... and enjoy it. Not as a punishment. No... being able to diet and lose weight is a PRIVELEDGE. It's an amazing thing. Unlike health issues such as diabetes, genetic heart problems, down's syndrome, and so on... we CAN change this. Not just live with it.
ETA: About life being horrible. Honey (I feel so old saying that... though I'm only seventeen...
), you're the only one that can make something horrible. I've moved from one place to another all over the world (no... not country... WORLD) for the past 9 years. I've never lived a normal life. Never had long-term friendships. I've lost family members to death... and all I got was a phone call. I could have complained, moped, talked about how horrible my life was... no. I learned to adapt. I've learned to become a chameleon. When I go to a new school, I find something to be happy about. Something I can enjoy. Even if everything else is bad... find something you can be very happy about. That'll help.