Maybe you're a little low in magnesium?

Also, there is evidence that chocolate prompts the release of dopamine, a feel-good chemical in the brain.

I would post links but pretty much every news article about it has photos of chocolate, which may be triggering for some, but if you'd like information about it, run a web search for "chocolate and dopamine."

You asked what you could do. Exercise prompts the release of dopamine. So does sex. I've read in a few places that avocado, bananas, lima beans, and other non-chocolate foods that contain tyrosine help boost dopamine. Bananas are kind of a double-plus because they also contain magnesium.