I'm 18, when I was 16 I weight around 88kg at 5"8, I listened to heavy metal and had long hair. Within 4 months, I had short hair, listened to "normal music" and lost around 25kg. My skinniest being 9 stone 3lbs. Like you I was obsessed with food, and generally still am, I think about it from morning until I go to sleep. I wouldn't necessarily say i'm well now but i'm healthy, I'm now 10 stone 6lbs and look loads better. It took time, and went through a lot of cycles such as eating badly, feeling guilty and then exercising to try and burn it off but the best thing that helped me was when my parents, family and friends started noticing. At first they said how good I looked for losing the weight but then started getting worried about me as I was restricting calories massively, eating 1000-1500 calories a day and exercising on top. I think when my friends started worrying about me, I needed to do something about it and over time, just upped my portions and forgot about my worries. Yes, I'm still afraid of getting big again, but then again, it's not going to happen over night and before it gets too bad and I put too much weight on, I'll go back to losing it again (hopefully this will never happen). But my point is, don't let it control you, try and eat out more if you can and indulge occasionally, eat well and exercise regularly.