need a lil advice

my husband is great, our marriage is great. except he doesnt want me to have friends and he even has an issue with me talking to my 15 year old sister. im 20 hes 24. he treats me more like his child and im not allowed to have facebook or any other social media. what would you say in this situation to your husband to tell him that youre going to do what you want and also be faithful... (never cheated nor disrespected him btw)