does your so have a say in what you wear?

I'm a girly girl I love to dress up and wear makeup and do my hair, I love fashion and high heels etc. My boyfriend feels uncomfortable when I wear certain clothes, nothing ever too revealing but he questions why I wear makeup to class when he's not even there and asks if I have someone to impress. How do I explain this to him should I be more sensitive to his feelings or just do what I want to do?