HipsAndHearts - Great advice! I agree that you should always have someone to be able to talk about things with.
Anon - I used to be like you - thought, things will never change, so I won't bother. Was like that for years. Even when I did try, it didn't work. But the fact is, if I'm honest, I didn't try hard enough, I was enjoying eating crap too much, and couldn't really be bother to put a lot of effort into excerise. However, now I've stopped eating and drinking crap, cut down on the amount of food i eat full stop (so thats mean now eating less food, but it's all way more healthy), I've joined the uni gym, started walking to more places and go for about a 30-50 walk everyday, and I am even going to the gym every morning during the holidays. I haven't been doing this long, but I'm really seeing some great results. As of today, I've lost 1 stone!!!!!
You'll have to make some radical changes to your lifestyle, like I did. I was so unhappy, didn't think I'd be able to do it, but I did it gradually, and in a time in my life when quite a few things were changing too. I didn't think I'd like this new me, but, by god, it's only been two months, and I would never go back to how unhealthy I was before. I feel so much better now, seeing the results (but still plety further to go) and just knowing that I'm doing something about the one thing I really hated about myself. You just need to find the courage inside yourself to step up and meet the challange. It took me many years to face the problem... but at least I'm doing something about it now. For your own sake, do something about it now. (How old are you by the way?)
It will take effort, but I really enjoy doing it now, espically when I see the results.
You have it in you... so go for it!!