That being said, he has never understood what the big deal is with dieting. "If you need to lose weight, just don't eat as much and cut out all the crap." (He actually is very supportive with this....he just doesn't understand why it's such a struggle.)
I finally got the point across to him

After pointing that out, he had no comeback (for once) and realized how it would be kind of a bummer to not have his "vice" to reach for whenever he felt like it. (Thankfully, his isn't outta hand, unlike his dad; MAN, I hope he doesn't go there.)
So, whenever I'm feeling low because I am having problems yet again sticking to something healthy, I remember that everyone has a vice. This just happens to be mine.