Boyfriend and family Issues

So. My family doesn't know I have a bf. Or that we've been dating on and off since I was 13 and he was 14. He graduated last year. I'm graduating this year. We met online (don't give me shit over it) and we video chat/text/talk on the phone every single day. My parents will hate me when they find out. But I want him to meet them. But I don't know how or when to introduce them. I've already met his mom. But in moving to Oklahoma, and he's going to be in Ohio. Which makes it so difficult. If I can just get their support, I could visit without feeling like my own family hated me. But I don't know how to tell them. They're so conservative and already saying how relationships that start online aren't real and shit. I don't know what to do.