This is very true, and you do not have to be overweight to suffer from this. It has more to do with self image. However it is something experienced more by people that are heavier. It is also something that an be a lifelong struggle. I know from my own personal experience, and am someone that has always been skinny. It is something I have only joked about in passing with close friends, but I also think they know there is some truth to it based on their comments at times.
I have never done the throwing up part, but skip meals on a regular basis or stave off the hunger by drinking lots of fluids or by just keeping myself distracted. Regardless of the vehicle the end result is the same.

I can relate to what you have and do go through.