Who has had bulimia that can help me?

ive had bulimia since my freshman/sopre year of high school. its now my senior year and its worse than ever. ill binge/purge anywhere from 2-5 times a day. it started out when i noticed i was gaining a little bit of weight and i would only do it after i felt i overate at dinner. i honestly haven't told anyone about, not family or my closest friends because im so embarred. my family has had alcoholism/depression/ mental health problems and so i know that that could have left me even more susceptible to this disease. i know how bad it is for me, i know people die, and trust me it doesn't make you any skinnier, but i was just wondering if people have any ideas that helped them? motivation to work out instead of binge etc? i really want to stop this before college and live a healthy lifestyle because i know this disease can go undetected and last almost an entire lifetime.