Keeping a secret!!!

I'm almost 19, I am living at home atm. I have a bf which I have kept from my parents for almost a year and his 30yo and I am moving out with him and another couple this weekend and idk if I should tell my parent soon or not but I know if I do they will loose there shit at me and I know there gonna find out sooner or later cause they will pop around my new place all the time. My parents don't like the age seperate on and do t like me having a bf in the first place but I really do think his the one I've never been this happy before, his so loyal and loving his makes me smile every minute of everyday. Honestly my own opinion is if I'm happy they should be happy for me.