My situation is : I'm 18 my brothers 19 my sisters 17.... I live with my mom and dad.... They are not married.... And they are letting my 17 year old sister date a almost 20 year old and let's him spend the night... They also let my brothers gf who is 18 spend the night.... Both sleep in bed together.... My bf who is 19 now isn't allowed to stay after 11 he has to be gone by 11...... My question is : why is my mom not letting him spend the night? Why am I the only one who is getting left out of everything?