Please Help Me On My Question.?

Well Lately Me And My Mom Has Had Problems. Mainly On The Way I Dress. I Am a Girl And I Dress Boyish. My Mom Said She Is Going To Give All Of The Clothes I Like To Wear And Buy Me "Girly" Ones. I Really Don't Want To Dress Like A Girl Cause Its Not My Style. How Do I Get My Mother To Let Me Dress How I Want? Oh And Also Im Gay, However My Mother Does Not Know That I Am And I Am Afraid To Tell Her Cause She Is Very Homophobic. How Should I Tell Her? Thanks.