I think too much sugar is a bad thing too in the long run. What's really important is that you recognize that it is an issue and make a plan to deal with it. It can certainly be a cross addiction but again - the way you deal with addicion is make a concrete plan and carry it out. Exercise, working with your doctor, trying to eat healthier food can all be part of that plan.
Another comment you made earlier was that weight gain "causes your relapses". That's actually a trick your addiction is trying to play on you - weight gain cannot "cause" you to relapse. What causes us to relapse is not following our plan.