No reasonable amount of indulging in this vice is going to cause serious short-term harm to myself or to others, unlike alcoholism. I suppose it’s a bit more like a nicotine addiction—long term damage to my health in exchange for temporary relaxation—except far more socially acceptable indoors, not to mention delicious.

I am not aware of chocolate being that bad for you. It sounds like the intrusive thoughts are more of a problem; certainly they're the only part that makes this sound anything like an addiction.

In my experience, very dark chocolate (80-90% cacao), especially the stuff with lots of chili powder, satisfies my chocolate cravings in much smaller quantities than milk or regular dark chocolate. It is also pretty low in sugar (while still being a lot tastier than the sugar-free stuff I've tried), which is helpful if sugar content is the source of your health concerns.

Your writing feels like it needs a special dictionary.

I would like to offer a distinction between two different kinds of accepting. One is the opposite of denial (which is being called "fighting" in this case). The other is the opposite of changing.

"accepting" != "acceptance". Why relabel "denial"? You attach a second meaning to "accept"... didn't "acknowledge","admit", "avow" or "recognize" work for you?