Is it wrong to be mad at my cousin

This b*tch when she first started living with us would always slap my butt which she eventually stopped doing. She is also super rude and has so much sass especially recently where I’ll say I’m uncomfortable about something like hugs and any sort of physical interaction or when she sits next to me while watching me play apex which i hate and she just says “that sucks”. It’s been getting on my nerves not to mention the fact she brought one of her friends in my room to check it out and it ruined my mood today entirely. I just want my space T-T