I know how you feel desert me... been there quite a few times myself. I agree with Kate.. think back to all the reasons you wanted to lose weight in the first place. Even write them down, make as long a list as you can think of, and keep it somewhere where you will be reminded of it regularly (eg on the fridge). Writing sometimes helps
If you can, clear all the danger foods from your house... but if that will annoy others, either tell them to get stuffed lol, or get them to hide it somewhere and not eat it in front of you.
And see if you can't get out on a quick walk every now and then. It's hard to get the motivation to start, but you will feel great after you get back!