How can I get my parents to see that social interaction is irrational, and I should be left alone?

You probably have your share of emotional junk...just like the rest of us. I suggest you get some meaningful counseling. Then, later, you'll be able to make a sane, and intelligent decision about hour life and career. One book which might prove helpful is "Focusing:" by Gendlin. Another is "Games People Play" by Berne. Good luck.