Go to walmart while hungry. You'll end up spending like 200 bucks, but you will have plenty of food for a while. I live with my parents but I often go buy my own stuff as far as snack food goes, but usually eat whatever meals my mom makes, though with my late shift I'm rarely home for supper now. I have to cut down on the fast food though... I'm getting better but still have to cut it down more. Real bad for me.
But yeah, just learn to fend for yourself and get your own food if there's nothing in the house. Just don't become a junk food whore, there's plenty of healthy snacks such as nuts, crackers etc. But if you're hungry for a meal then have an actual meal. I'm sure there's got to be some Michelina's and other stuff like that in the freezer, or left overs.