i dont really know too much about this, but is he being medicated for it? i believe that helps reduce the risk a lot.
and i hope that first poster didnt offend you too much, i remember when my boyfriend hadnt gotten tested and i was worried, because i was a worrier, i knew even if he had something i wouldnt leave him =]
it's easier to deal with an STD than trying to find someone who really loves you.
also,call a doctor and ask for some tips.
i hope everything works out!