@MarianneUnfaithful - Spot on!
@Dontwatchfootball - I know how you feel, been like that myself for years. 8 weeks ago I said enough is enough, I have to be strict with myself and do something before it's too late. It's horrible seeing other people do so many things that I can't simply because I am too overweight.
So, at 18st 4lbs, I joined SW, but to be honest I took some of their advice, and tips from other diets. As @MarianneUnfaithful says, change your lifestyle, cut out snacking etc, watch the portions. It takes a little time to adjust, but you will get there. Every pound you lose will motivate you to keep going. In time, you will slim down, and be able to do more things as you get lighter, making you a happier person etc.
All told, I have lost 25lbs in 8 weeks and I feel like a different person. I still have 59lbs to go, but it's well worth it.
Your post on here asking for advice is the first step of your journey, pat yourself on the back for doing that!