Hi, Since you said that you are 18 years, you are Major as per the Law. And you have the right to possess independence. And as you have mentioned that you don't wish to get married and you want to leave home and stay alone. You can and there won't be any legal implications for that. As nobody can force you to get married. But however, You will not have rights to use force on anyone and also use language on any other individual. You will be solely responsible for your own actions going forward.