My sister has hit me every day of my life from the first day I can remember. When I was 12 I remember her hitting me repeatedly with a giant textbook in front of one of my friends because it was raining and I spun in a circle and water off my jacket hit her (not anything specific or like ruining anything but simply because I "splashed" her). She has punched me, pulled my hair out, and punches and pokes, but never leaves lasting scars (less than 2 years at most). She threatens to kill me once every day and even though I know they're empty threats, I still find myself fearing for my life sometimes. Every day I spend the majority of the day convincing myself that things aren't so bad and when her "outburst" hits, I am reminded how much I hate living here. My parents act as if nothing is happening and when they act like it is happening it's worse because my sister will threaten them and storm off and neglect everything. I do everything for her; chores, organization, even homework sometimes. She refuses to allow me to have friends that don't like her, even though she has no friends (maybe 1???) and is trying to make me the same way. She is rather manipulative and will make me do things I don't want to for her amusement. I know this sounds abusive and it may very well be, but on a day to day basis there's only one or two times a day I am truly upset about it and I rarely find myself in a state of true suffering. Is this abuse?