I'm feeling horrible about my diet

I've long had a problem with overeating. It's not so obvious by looking at my body. But it's there. I had this problem in high school where I would eat an entire box of Ho Ho's. The problem got worse when I got to college and had my own apartment. I now routinely eat a box of Kraft mac and cheese for lunch, or eat six chocolate chip cookies for snack. Just a few weeks ago I ate five donuts in one afternoon. Five.

I have a serious binging problem.

To me, junk food is a compulsion. If I see it I have to have it. Leaving it, or not eating it, simply isn't an option. I take home pizzas at work so they don't get thrown away. Any time we have sweets in the house I devour them all often before the boyfriend has any. I don't know if it's a good thing or a bad thing that he doesn't like sweets. I know the cookies aren't going any where, and that I can always make or buy more, but I feel the urge to eat them all NOW.

Why? Why??

I have two theories. First, my dad and brother ate a lot of sweets when I was a kid. A double batch of chocolate chip cookies only lasted two days in our house. So I ate as many as I could because I know they wouldn't be there long. Perhaps I'm still afraid someone else will eat them first, even though I know no one will (the exception being at work)?

Second, and what's probably the real culprit, is that I'm addicted. It's been shown that fatty foods release dopamine in the body. Here is a study where people were shown pictures of fatty foods and their brain activity was recorded.

"In the junk food eaters, the decision-making area of the brain (the orbit frontal cortex) released a surge of dopamine as they looked at high-fat foods. This is the same reaction drug users get when presented with cocaine."

Further, a study was conducted on rats.

"They discovered that when the fatty treats were presented to the rats, they began binge eating them, even though they had an unlimited supply of nutritional food." 

According to the research, my brain reacts to fatty food the same way a drug junkie reacts to cocaine or cigarettes. And even though I have plenty of healthy food at home, my addiction keeps me binging on fatty foods. There's only one way to break an addiction, right?