I hate living with people :/

It should be common sense that in a shared living space you shouldn't just take food without asking who it's for. Not everything is for sharing. Go fucking figure that I'm already having a bad day and this inconsiderate moron chimes in with his cluelessness. I'm so sick of him having no sense of how his actions affect other people. Takes shit without asking, moves shit and doesn't put it back, doesn't take care of his dirty dishes, puts more trash in even when the trash can is overfilled but won't actually take out the trash, and he's completely oblivious to how much etiquette he lacks because he never stops to think about another perspective. Even when it's explained to him he just forgets because apparently it's so hard to remember that the world doesn't revolve around you. Usually it's whatever, I have an extremely high tolerance for bullshit, but having my food stolen when I'm tired, super hungry, and living a shitty day in a shitty world drives me fucking insane. I wish living wasn't so expensive. People used to be fully capable of moving out of their parents house at 18. I don't wanna be here anymore. Or at the very least it'd be nice if he could get the fuck outta here because both my parents are pretty chill I got no problems with them.