Living with the Dursleys

Harry is actually accepted into the Dursley home, however it seems he idolizes Petunia and his mother, in his quest to be more like them he dress like them too. What's Hogwarts to do with across dressing Harry? This is the Why/Reason that Harry cross dresses. Harry from ages 1 1/4 to 11, Petunia and Vernon's POV.