Roommates creating temptation!

I recently moved into a townhouse with 3 friends I've never lived with before. They love their junk food. In fact, their eating DQ in front of me as I type. I'm dying. I'm all for the occasional treat, but not as often as they are. I've tried having my own small sweet snack to tide me over, but looking at their medium Blizzards, my stomach has already forgotten its full. Anyone else deal with this before? Thanks!