we've had a whole argument before about this because he always eats food that i buy for myself, most of the time WITHOUT asking me first.

he buys himself strawberry waffles, i buy myself blueberry. he blows through his box in a day and a half and i save mine for when i want it. when i do want it..it's gone because he ate it because i "took too long to eat it" he even opened it from the back so i wouldn't see that he ate them (almost all, there was two left)

i buy myself a pack of yoo-hoos, i only was able to have two. he had the rest when i told him he could have two. i buy bagels, he eats my bagels, yadda yadda yadda.

like i said already too, it's not like we haven't talked about this. we had an argument because he thinks it's ok even though i tell him i don't like it. and when i looked into my bag of groceries today, they're all missing items :/

how do i talk to him about this without starting another argument? its not like he cant buy his own things, so i don't know why he feels like he has to eat my things

i just want him to ask if he can have something and then respect when i give him a limit. how do i go about this like a good adult?