Parents vs. Boyfriend

I really need help. From the time I started dating my boyfriend, my parents didn’t like him. My mom and dad are super protective and my mom is really judgmental. It’s been a year now since we’ve dated and he’s tried to reach out to patch things up with them but it’s still not working. I’m getting close to finishing college and we want to possibly get engaged when I get out, but he wants my parents to be okay with us being together. What do I do????