Is that on an IgG?
A score that high probably isn't a false positive. However, you've probably had it a long time. Many people get oral hsv1 as kids, from family members, or when they get older from kissing.
3.7 billion, or 67%, of people under 50 have hsv1, so you certainly aren't alone, or rare, or anything. 90% of them never get cold sores.
You can read more here. https://www.ashasexualhealth.org/oral-herpes/