My boyfriends twin and sister in law or ugh !!

Now my bf twin is nice i just hate he constantly hits my boyfriend up and ask for rides my bf doesnt have a car he drives mines, his twin nd his wife will give him like 5$ for gas now and now that they finally got a car my bf gives them more then they even need for gas! Then his sister in law doesnt even like me she always got in my car mever said hi or thank you, and i hate that she feels the need to follow his brother everywhere if we give him a ride shes coming too, i dont like my boyfriend to talk about our problems in front of her to his brother because she loves it, his twin and her always have problems so she lives off finally hearing we got sumn going on, so annoyed