Yup, been there, done that, and bought the plus size tee shirt....
And for me, the icing on the shameful cake was tossing the empty bags out the car window (yup, a good citizen-not. A litterer.) Then, I'd procrastinate about making dinner because I wasn't hungry... then, yup, eat again.
But I promise you that you CAN break the habit, and quicker than you think.
For almost two years I NEVER went to work without stopping at the same gas station for coffee and 3 danishes.... I used to stop even it it risked making me late for work.... I thought that place had a tractor beam that pulled me in from the highway.
But, when I decided to firmly break the habit the craving went away really fast-- probably two weeks tops. The hardest thing about cravings is that it seems like we'll have to battle them forever so it hardly seems worth it-- but in reality, they fade surprisingly fast.
Sounds like you have happy memories associated with stopping there-- you stopped there with your husband. Now, you're trying to recreate that happiness by stopping-- so maybe if you remind yourself that you will be happiest after you get home and relax with your family and so you don't want to spare the time stopping, you might find that it helps.
I learned that trick from the book Overcoming Overeating, and it does help me when I realize that what I'm really looking for is a bit of happiness-- something I'm not at all likely to find at a fast food place.