Do you mean what are the odds of him giving you oral sex and getting your HSV 2? We don’t have statistics on that but if he did, it would look just like a cold sore and without a type specific swab test, he could not know that this is HSV 2. If you decide to take antiviral therapy, the overall risk of shedding virus is reduced so it should help with this situation as well as intercourse. What specific concerns do you have about antiviral therapy?
Did your doctor friend know he had herpes before he had sex with you? Did you read about the $900,000 settlement in the Portland, OR case? Its just not OK not to disclose this information any more.