If you have HSV1, and it is more likely to do so than not, then most likely this is an oral infection from your youth. A retest will very likely result in a similar outcome.
If you are really keen to determine whether you have a HSV1 infection, then seek a Westernblot. My view though is simply forget about it and enjoy your relationships, mutually tested of course. If you happen to have it then you have great protection from a genital HSV1 infection.
I should note these results were form a blood test through LabCorp in 2014.