Once someone has HSV 2, they odds of getting HSV 1 subsequently, is something like one in 50,000. I don’t think that’s what’s going on, though you may have HSV1 – hard to say from this testing as the IgG test misses 30% of HSV 1 infection.
I am concerned about your partner’s HSV 2 diagnosis – was that from lesions or an antibody test? From your post, I’m thinking that was the case. Depending upon the index value from his result, he may benefit from a western blot, yes.
If he has oral HSV 1 he will not acquire HSV 1 genitally.
Terri