Feeling Unwanted

So my boyfriend says I'm beautiful and that hes very attracted to me but I just have a very hard time feeling that he is. When I try to dress up or dress down like show some skin. I dont really get much of a response, maybe a you look nice really no response for dressing down but I just want him to show more of a I dont know maybe a desire I just want to feel like hes actually wants me in that sexual way. I just dont know what to do.