Welcome to the forum. Thanks for this question. And congratulations on a responsible, non-panicked perspective on this, and for the support and care you show for your partner. For a lot of men, if a partner turned out to have herpes it would be "Sayonara, Baby".
These are typical questions in settings of new genital herpes due to HSV-1. My replies will be brief, but more detail is available at the following link.
http://www.medhelp.org/posts/STDs/Recently-diagnosed-with-Genital-Herpes-HSV1/show/969931
Give me a bit more information about the circumstances. Presumably her infection is newly diagnosed, correct? Say more about her symptoms and when they started, and whether (to your knowledge) she had sex with anyone aside from you in the 2-3 weeks before onset. Also, let me know exactly what tests she had to confirm her diagnosis and the virus type, i.e. HSV-1 versus HSV-2. If not, it is likely you are the source of her infection, despite having a negative blood test. Up to 15% of people infected with HSV-1, maybe even 20%, have negative blood tests results.
1,4) Genital HSV-1 is less frequently transmitted sexually than genital herpes due to HSV-2. She may have few or no future outbreaks or viral shedding. Further,if you were the source of her infection, you are not susceptible and won't catch it again. Even if you are not infected and therefore susceptible, the chance of transmission is very low while she is taking acyclovir plus using condoms.
2) If she had oral sores along with her initial genital symptoms, then she may develop recurrent oral herpes due to HSV-1. If there were no oral symptoms, probably this isn't an issue.
3) See the linked thread. We can also discuss this better once I have the information about her symptoms, diagnosis, etc.
Bottom line: Nobody wants genital herpes, but if it happens, HSV-1 is the preferred type. In the long run, it's generally not a big deal at all. Take a look at the other thread, then come back with the additional information, and I'll fine-tune this advice if necessary.
Regards-- HHH, MD