I don't want my family to know that I have a boyfriend.
Why do you want to keep your boyfriend a secret from your family?
I'm not sure that my parents will approve of him and I want to wait to tell them about our relationship.
I understand that you're worried about how your family will respond to him, but you should be honest with them and let them know about your boyfriend. You will have to keep a secret and that will be very hard for you. Be honest and introduce him to your family, they have a right to know.
Right now, I'm going to try to focus on my boyfriend. Maybe I'll introduce him to my family later.
It sounds like you're leaning in the right direction. Just make sure not to keep your family in the dark, otherwise it may lead them to be suspicious of why you hid your boyfriend for so long.