You taking daily suppressive therapy with valtrex overall reduces the risk of transmitting the virus to a partner by 1/2 but that doesn't take into account when you have obvious lesions.
It is hard when you get the out of the blue recurrence of your herpes

We've all been there. most of the time it doesn't result in infection for your partner but only time will tell if it did or not. You already are doing the best you can for your partner - you are taking suppressive therapy and avoiding sex when you have obvious lesions present. we can't control it all 100%
betsy