I had asked for some clarification and have not heard back. This clarification is necessary, as the oral sex that may have happened is the only potential source of risk.
There is no risk from the man using his hands to rub your penis. There also is no risk from kissing, tongue touching, or from the scab on the face. There is some potential risk from deep kissing if there is also a source of bleeding, such as gum disease.
So, the only real issue is whether there was any oral penetration when he sucked on your penis. If the penis was in the underwear during the sucking encounter, then there is no risk. However, if the penis was even partially exposed from the underwear when he sucked on the penis, then there would be some risk. Oral sex has far less risk than penile-vaginal sex or anal sex, but there is a small risk. In addition, if the medicine that he takes every day is successful at lowering the viral load to an undetectable viral load, that would almost eliminate the risk.
So, if your penis remained in your underwear throughout the encounter, there is no risk, but if the penis was removed, there is a small level of risk.
If I can provide any additional information, please let me know.