Welcome, and good for you for trying to take care of this so early! I wish I had been able to diagnose myself at 16.
I found that when I would compulsively eat that unconsciously it was because there were other things going on. My only point is that so many of my diets failed in high school because I was trying to correct my eating instead of my emotions.
I really hope you find the support and the help that you need here, and I wish you an enormous amount of luck on your journey!
I'm a compulsive eater as well (I would eat more when I was bored than anything else), and I've found that keeping a very strict food diary and making sure to log everything I ate helped me a lot. I recommend
www.thedailyplate.com, just make sure you don't follow their bogus advice to "eat back" your calories. It will also let you know how much you should be eating to lose the kind of weight you would like to. I also recommend setting your activity level to the second lowest -- that way you can enter in your exercise as well, but don't have to do it for stuff like "sitting" or "brushing your teeth" -- lol. It has a huge database for googling food items and entering them in. It's been the reason I've lost about 23 of the 36 total pounds so far.