Help me on this please?

okay well my boyfriend that i have been dating for 6 months might move down here. im 15 and hes 28(I Dont want any answers saying hes 2 old bec i alrdy know ok!) but my nana is trying to throw him in jail right. and hes oving down here so he can see me because we dont talk because of my nana and it hurts. so what are some ways i can go to where he is going to live without my nana or anybody that lives with us knowing. PLEASE Help! Please Dont Give Me No Answers About Our Age! Please Help!!!!!!