Ok - I shall join in for moral support even tho I didn't have to lose that much.
I am 5'10" and was 10 stone in my twenties. Put on weight due to pill, hormonal problems, then deranged after 2 babies 18 months apart. Ended up at 15 stone.
I'm now about 12 stone 10 and falling...
The thing you have to bear in mind is that if you are very overweight you have a good head start at losing it, as your body needs lots of calories just to maintain itself. So you don't need to 'diet' - just eat a bit more sensibly and keep snacking on low GI foods. Don't eat white bread at all, especially french sticks.
Try to cut out salty and sweet snacks - eat lots of high protein, low fat food eg ready cooked & flavoured chicken breast. Cut out alcohol except a glass or 2 at the weekend - loads of empty calories.
Start walking with a friend if you can - try to make it at least half an hour 3 times a week and don't stroll - walk briskly to get your heart rate up.
You have to make this a gradual change that you can stick to for years - don't starve yourself.
I bought 'The GI diet' book and found it helpful - didn't stick to it rigidly - it's full of great advice & info.
Above all, you have to believe that you deserve to lose weight - don't punish yourself by stuffing your face if you've had a bad day on your diet.
Once you go down a dress size or 2 you'll be able to buy some new clothes and you'll feel so much better it'll make you want to keep eating healthily.
Lastly... I always think of my kids... if your body mass index is over 30 you double your risk of oestrogen related cancers such as breast cancer, ovarian cancer etc. Also, when you're as old as me (46) you have to think that you will soon be menopausal and at huge risk from heart attacks & strokes.
Go on - you deserve to be fit & normal size