I used to eat fast food and go to restaurants all the time and found myself doing the same thing with all my groceries in the fridge. I would let things spoil and only have a small amount of it before just throwing it out. Working in the service industry has also made it difficult to want to cook at home since I can just order anything and get it half odd- then not have to worry about the dishes!
I have made it a point to start cooking at home and eating healthy though and I haven't eaten out once in over a month. Amazingly I find myself enjoying the ritual and routine involved in my daily food prep now and I am reaping the health benefits of sleeping better, elevated mood, more energy and mental clarity.
Good luck on getting back your mojo :P