Please help herpes borderline results

I've recently had a blood test for herpes after a partner told me she had it, i have had no symptoms, herpes. simplex 2 came back as "borderline" she told me she's had it for years and takes daily medication and hasnt had flare ups in years. The last sexual encounter would have been 1 month ago and the first was roughly 6 months ago is it likely I'm infected and my body hasn't had enough time to build antibodies, why else would the result be borderline.what should I do to confirm.please help