My mom won't let me have a boyfriend.

I've had a secret boyfriend for almost 7 months now. And, we're planning on telling her that we're together, but I'm afraid that she won't let me see him again. I'm afraid of what would happen to me and him if she won't let me see him. I know that he's a very sweet, caring guy. But what if my mom won't let me see him? :/

But we're not planning on having sex. We're more mature than that. We wouldn't even dare make a dumb mistake like that.
Well, my mom has met him plenty of times. We've known each other since 2nd grade.