It's unnecessary to make myself vomit. I think doing so could actually re-traumatize me. This isn't avoidance, it's common sense. If I had a fear of heights, I wouldn't jump off a building to overcome my fear.
I think it's perfectly acceptable and "normal" to BE afraid and NOT want to vomit when I really AM sick (ie flu) because people who are NOT emetophobic don't WANT to vomit and most are afraid to when it's about to happen. Emetophobics, on the other hand, live in a state of perpetual fear of what is almost always only an imagined threat - 99.999% of the time we misinterpret the normal feelings, movements, and noises of a healthy body's digestive system at work as nausea.
So, I'll consider myself cured when:
1. I stop avoiding life for fear I might vomit at some point.
2. I stop believing that vomiting, should it happen, is somehow dangerous.