I agree with everything that has been posted here but I wanted to add that once you do have that conversation and he (hopefully) agrees, be prepared to be patient. People who have those fears can't just let go of them overnight. He will probably need baby steps with lots of reassurance and long conversations. You can give him an ultimatum and tell him that if he doesn't give you exactly the same privileges all at once you're leaving and he might listen but that would be very hard on him and that won't help his insecurities. But hopefully he will understand that you deserve this too and both of you can work on this together.