Are you that member of the family?

Are you the member of the family whos belongings dont count or matter but if the same was done to another members there would be murder? I am and Im sick of it. I buy stuff for myself be it food or goodies I like and when I go to have them they are gone and nobody cares that they were just mine. Or when I buy stuff for the computer say headphones or just stationery everybody uses and abuses them without asking be it my brother or cousin or sister but if I were to do the same to their stuff, good luck!! Just wondering if anyone else has a family where you dont count. I am the youngest but I am also frigging 30!! and still it happens.... Grr