If you want motivation check out Ironman's topic in the Before and After section.
He got fed up with being 442lbs and didn't think he would be able to take it off by his own will alone so he had gastric bypass surgery to lose weight but it turned out he judged himself wrong because shortly after the surgery he was doing tons of exercise and eating right all on his own and lost 235lbs in about 9 or 10 months.
All anyone needs to do this is patience and dedication.
I am reminded of a Lord of the Rings quote now that goes...
"Even the smallest person can change the course of the future"
I think that goes the same for us larger people as well lol.
We can change the course of our futures with hard work.
In anycase there is lots of support here and you'll get nothing but that from me.
Enjoy your stay on the forum and check out the diary section for even more motivation when you get time and are in need of it.