You can always do it next week, so why not see how this week goes? It's not a healthy way of looking at it, but I'd be lying if this exact thought didn't get me through a rough period in my life.
Madness string 101117
Addiction is compulsive engagement in a thing despite consequences. Unfortunately diet tends to be a slow burn; you don't feel blood pressure or sugars creeping up until really it's too late. You can more or less live a normal life before you deal with the consequences in your late 20's.