Being young and being overweight

I am pretty sure most the people on this site are young people like me. I am 18, and I weigh 190lbs. I think one of the scariest times to be overweight is when you are young. Because when you are young and overweight, you think "Oh great I got another 60years to keep gaining!" For me the biggest issue is being a teen and overweight. When I was in elementary school I was very very skinny until 3rd grade. After I was sexually assaulted my weight sky rocketed. I weighed 160lbs by 5th grade. People thought that they were saving me by telling me how awful I looked, they assured me that if I didn't stop eating I would be dead before I reached 25. One day this older chick was really pissed at me for no good reason, so she screamed at me how stupid, worthless, and fat I was. She said something that has always stuck with me. "You Fatty McFattyson! Some kids grow up to be doctors and rocket scientist, you're gonna grow up to be a big blob on the side of the road that people like to run over with their cars!" Those words have always stuck with me, because it's my fear, that I will grow up to be nothing. I have proven that woman wrong in many ways, I am highly active in the community, every one knows and likes me, and ironicly I am studying to be a doctor. But I hate how everyday I am faced with the fact that she was right about one thing, that I would always be fat. I think everyone has at some point in their life been teased about their weight. Whether being too fat or too skinny. Do you think that what people say to us about our weight effects our weight? Have I been trapped in this fat suit because those words have always rang in the back of my head? And, is there any hope for young people who are overweight? Do they pretty much tend to struggle with it their whole life? Is any one else having this same experience?