Yaseko,

My daughter (who has many Aspie traits) has done the exact same thing. I expected this behavior when she was a toddler but she never outgrew it. She is currently 14 years old and is just beginning to sample new things albeit in very limited quantities. She too would be horrified if she unknowingly ate something other than the very limited foods she "approves" of. She has never had anorexia/bulemia it's, just one of her quirks. The only problem I see (for both my daughter and you) is that limiting what you eat may deprive you of needed nutrients. Nutritional shortcomings can lead to health problems and, if you are still growing, it may stunt that process.

If you have a therapist, I'd talk it over with him/her.