Everyone has given you such great advice and encouragement so I won't add much there but I will say this --
Please don't compare your husband's addiction to alcohol to your addiction to food/sugar. People do not need alcohol to live whereas we still MUST eat. We are forced to face our addictions every day or we will die. If your husband was forced to take a shot of vodka everyday in order to keep breathing then his alcoholism would likely come back in full force in a short time. Know what I mean? And realistically, we cannot avoid sugar
all the time. We just can't. So when a little bit enters our system it triggers us to wanting more and more. That is when our willpower needs to kick in. And yes, maybe your husband has a little more willpower but everyone finds a way to get it at their own pace.
Don't beat yourself up. It sounds like there may not be a whole heck of a lot of support for you but you had found a way once to lose all that weight and YOU WILL find your way again!
And maybe it is about having a goal such as your wedding. That motivated you to lose weight. Maybe you can plan something else such as a trip to the beach next summer? Keep your eye on the prize??
Keep the faith -- and find that willpower!