Distant relatives moving in?

It sounds like you are jealous of them. They are there because your mom or dad or both invited them. Remember 1 thing the house you live in belongs to your parents not you. If they are acting out like you say then your parents probably not put up with it very long, but to me it sounds like you may be overstating the truth. Just hang out with your friends at their house. Maybe your parents invited your relatives so you could see how they felt about your friends and you.