I think you're taking a mature stand. You love it curly, it's you, and you shouldn't have to compromise yourself over what others think. And your hair is gorgeous so I really don't see his problem.
I would do a nice updo so he doesn't equate curly hair with hair that's not 'done'. It might do a lot to prove your point.
Maybe pin back most of your hair and leave some nice face-framing pieces out (maybe finger-curl them so they look neater)?