Mallu muslim boyfriend doesn't allow me to wear dresses without dupatta why is he behave like this?

my boyfriend is muslim and I am hindu. he always conscious about my dress. he always says you have to wear duppata with dresses because boys will look u very vulgour. that is ok. but he doesn't allow me to wear dresses in big ceremony without dupatta. cause I want to wear gown. how can I wear a dupatta with that? he didn't listen me. he stands very stubborn? i can't control him? he makes problem over with these isseues like large neck dupatta, etc. he doesn't understand me. doenst listen. how can I change him?
Mallu muslim boyfriend doesn't allow me to wear dresses without dupatta why is he behave like this?
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