Are you blessed with an extra chromosome?
I will break this down into simpleton terms.
You have cold sore (HSV1). It affects mouth. You suck your boyfriends dick. Virus has now infected his genitals.
Boyfriend has genital herpes. Boyfriend does not have oral herpes.
You have oral herpes. You do not have genital herpes.
Straight from google:
The virus sheds from the specific nerve territory (dermatome) where it first entered the body. Because the virus hides in the nerve roots at the base of your spine or face, it reactivates and travels back down those same pathways to the skin.
If you have genital herpes for instance, it generally sheds from the boxer short area.