Are IgG blood tests accurate for herpes? If they are and it's not herpes my bf and I had than what could it of been?

Herpes Testing. Igg testing is the common way viral infections are tested for. These tests are in general very accurate, except early in an infection. A mature (ogg) antibody can take three to six months to reach maturity. Without seeing or knowing more about what 'you and your boyfriend' had i cannot answer the second part of your question.