no. you arent wrong at all. i have had roomates that didnt buy groceries and use to eat up my **** all the time. evenfood i have half eaten!!! i just bought all my stuff and kept it in my room. if i bought meat it was cooked that night and kept for myself. only put my drinks in the fridge during the day so i could monitor it. they use to drink sarahs stuff when she use to come over.(before marriage) so r justified