HI
I have been where you are. I was 16 when I started bulemia, and I continued till I was 32. You don't want to be doing this all your young adult life. It will really mess with you and the more you do it, the more it seems normal, and the harder it will be to get out of it.
Get help if you can, go to your local doctor and talk to them and they may be able to point you in the right direction. If you don't feel you can do that then there are other things you can do
It seems to me that bulemia is mostly about control. You finally feel like you are in control of your diet, that you can eat what you like and it won't affect your weight, at least that was what it was for me. In actual fact the opposite is true, the longer you are bulemic, the more you mess up your metabolism and the more weight you put on when you do digest something.
I know exactly what you mean when you say you think about food all the time and it actually affects your life. It was like that for me too. I was a fat child and teenager and desperately wanted to be thin. i did that but at such a terrible cost! In looking back I would have been so much better to go on a sensible diet and exercise and I would have lost the weight slowly yes, but safely and I wouldn't have ruined my health too.
Do your parents know about this? The first step to fighting an addiction (and you have a food addiction) is to acknowledge it and admit it to those that are in a position to help. Maybe you can talk to your folks about getting you onto a healthy eating plan at home, and doing some exercise. By the way I found exercise the best thing, as this actually releases endorphines into your brain making you feel better and impoving your mood. If you do it regularly you will actually start to see great results within your body and not feel like you need to binge.
Anyway, read as much as you can about it and understand that you are not alone. There are so many people with this disease and all struggle with it. The media doesn't help with such unhealthy models and actresses everywhere.
Best of luck and I will would love to hear updates from you from time to time if you can