My first question to you would be has your partner been tested to determine if he has herpes or not. If he has actually not been infected with herpes and you were taking daily therapy the risk of him acquiring HSV-2 from you is about 2% in a year. This applies if you’re having sex about twice a week and no condoms are used. If condoms are used the risk reduces even further. However the first important thing to do is to get him tested to determine that he actually is not positive. Though he is immunosuppressed I’m not clear that he has a much greater risk of acquiring herpes from you then if he was not. Have you told him yet that you have herpes? If you have how did you do with that information.
Please let me know if you have further questions