I have been where you are. Back in 2002 I was overweight and out of shape. Things just got out of hand little by little, 1 lb here, 4 lbs there..
(insert sad yet funny testimonial here)
Back in Dec 2002 (Dec 17th, 2002 to be exact), I was watching this video of a traffic stop myself and another cop was involved in. I saw myself but didn't immediatly recognize me. I was thinking "Who is that corn fed supersized cop? I only remember two of us on the call?" Once I realized it was me it was a huge wake up call. Say what you will about Atkins, but I started researching it and Jan 1st 2003 started on phase 1. By the end of 6 months I had dropped 50 lbs of fat and have modified my diet from Atkins to just watching simple carbs and excercising 5 to 6 days a week and have maintained the weight loss. The coolest discovery I made was that it didn't take a lot of will power because I never let myself get hungry. Low carbing, there is a variety of good foods to eat so I never felt like I was on a diet. I had cheat days scheduled and often would pass on them because I didn't need it.
I think what I , am most people who battle weight do is get tied up in exotic, drastic weight loss diets, where we have lost and gained the weight overe and over, forgetting that it's a lifestyle change, where little changes make big differences over time. I am 7 yrs "Sober" and continue to make good choices about foods and excercise and it doesn't seem like the struggle it was for 20 yrs prior..
Anyhoo, hang in there, find what works best for you, for the long haul, and just do it.