Well my guess is you have a long standing oral infection. Unfortunately there is no way to orove it unless you get lesions and have them swab tested. Hsv1 is very common as well over half the adult population has it.
If you do have a genital infection then you still don't need to be overly concerned as genital hsv1 sheds very little and transmission through intercourse is believed to be extremely rare.
Have you ever tested before? Do you ever get cold sores