How can i get rid of my muscle?

ok so ive been trying to lose weight. and i finally got to be a two digit number again! (98 pounds) so i dont really have any fat anymore, but im a student athlete and i still have muscle on my arms. like i just wanna be skin and bones, no muscle. like models that bony look they have looks so great and feminine. since i dont have big i just wanna be really tiny all over. is there anyway to lose my muscle so i can be even smaller? im almost 17 btw if age helps.