It may be possible the virus has run it's course in you, but why risk it? Sure, he had a homeopathic remedy. I am not saying all homeopathic medicine is bunk, but the reason it is still homeopathic is because it has not been proven effective in objective experiments yet.
Chicken pox can be dangerous in adulthood. Have him do the safe thing and get a Varicella vaccine. If you ever have kids, he will probably be exposed to it. And you will be doing your kids a favor if you expose them to it when they are about 8 years old. It itches, but protects them not only from chicken pox but small pox for life.
