Yes, this can kill you andd look at what it is doing to those that care about you and love you. Look at is this way, a car cnnot run without fuel and oil and proper care and neither can your body. You can end up with brittle boned, unable to help yourself with a tune in you because your esophaugus and throat are shot antd the tube is used to feed you. Get help before it is too late, go to the Dr., the school nurse, talk to your parents, some one and remember, you are not alone on this, their are a lot of girls that do this and it is not good, get help!
Good luck!