AB at 18 your parents are under no legal obligation to allow you to reside under there roof . EVEN IF your still in HS . At age 18 your supposed to be considered a adult so If you want to live under your own roof , be on your own , and have all the financial responsibilitys of adulthood By all means feel free to leave home . Being on your own Isnt all that bad , youll have to pay rent and utility bills some where , you have the right to go hungry ,and the right to be evicted in court If you cant pay your rent ,right to be cold if you have to cut back your heat in order to keep gas bill managable , youll have the right to decide do you need new shoes ? or put gas in to a car , ETC the list goes on. NOW if you can negotiate with your parents a rental agreement ,likely it will be cheaper than literally being on your own . you know that agreement may well also include them not wanting to tolerate extreme late hours , or perhaps including things like music volumes , house hold chores , and many other things . My whole point is your going to have to decide if your better off at home or not . BTW if you take too long they may decide for you . so go talk to them no anger no fighting but do talk to them