Anyone that has in depth knowledge about HIV?

I have been HIV positive for 6 years and never had to take one pill, no medicine, had one baby, and I have been dating the same guy for the last 6 years and we regularily have unprotected sex-his choice by the way- and he knows about it, and he still tests negative all these years later???? My bloodwork constantly comes back as a zero viral load "undetectable"..... My immune system is perfect... Why am I still in good health? Why am I not sick and dying or showing any signs or symptoms???