Vent away!
#1 - I have also had my DH eat the things I especially got for calorie control, like portioned almonds, tuna made with an EXACT amount of ingredients, etc. But my guy gets very offended if I try to delineate 'yours' 'mine' so I hide it as best I can
Is your guy gonna react badly if you point out that he bought his junk, he should stay away from your stuff?
Vent #2 - girl, I took our bathroom scales out to the garage a few weeks ago because it was making me crazy. Be perfect on plan for 3 days, feel starving, tell self 'you must have lost SOMETHING' hop on scale and see that it's UP? Where's a stick of dynamite to blow that thing up
#3 - you can always count on someone to say something that you'd rather not hear
Even when I am at a good size, and I choose to have half a sandwich instead of a whole, there's someone who will comment on that. "Why just a half? are you starving yourself?" I guess you can build an arsenal of snarky comments if that satisfies, sometimes it does for me...or just smile and say 'thanks, i'm following doctor's orders' or whatever.