If you are making yourself sick, then it sounds like you have an eating disorder (bulimia). also, eating until you are sick is an eating disorder as well (compulsive over eating), which is so much more than simply being greedy. there are probably underlying causes to this, which you really need to address. go and talk to someone, your best friend, your mum, a doctor. being sick a lot, over a period of time is really awful for you. it eventually corodes away your teeth, your hair starts to fall, you nails will be brittle and your skin will be dull, and eventually your body will struggle to keep any food down.
To try and stop yourself binging, keep only food for meals in the house, and have fruit for snack food, although i understand this isnt easy when you still live with parents. try and keep yourself occupied with uni/college work. i know this doesnt address the underlying problem, but by keeping your mind of food and by not having rubbishy food in the house, you are diverting attention away from eating, but i know this can be difficult.