How to express to boyfriend that you don’t want to be required to wear a head covering if we were to get married?

My boyfriend is messianic Jewish and I personally do find myself pulled between Catholicism and his religion. The big problem for me is that if we were married, he would want me to wear a headscarf or at least a funny hat head covering (the women’s kind that looks a little like a beret with a visor—not the guys’ Kippah). I just don’t know how to talk to him about this because... I do love him and I’m not very assertive, despite having feminist views... help?
How to express to boyfriend that you don’t want to be required to wear a head covering if we were to get married?
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