My boyfriend has an unusual eating disorder. He only eats select foods such as cheese sandwiches with a certain kind of cheese, apples, bananas, eggs and sausage rolls. He wants to eat other foods however when he tries he has a gag reflex and does for 6 or 7 times after trying new foods. He has had this problem for 30 or so years and I was wondering if there is any treatment or help for this sort of problem. Any help would be much appreciated as I am very worried about him.