Goodness, after all this time, chances are good that you already have hsv1. Have you ever tested? You could have gotten it as a child and never had any symptoms. If you have it already, you can't get it again.
The vast majority of people who have it orally never get symptoms, and 2/3 of adults globally have it, so you could easily be one of those people.
If you aren't, with just a bit of red area, and it was just a quick kiss, I wouldn't worry.
If you feel like testing, ask your doctor for a type specific IgG herpes blood test. Ask for a type 1 test only. There are false positives on the hsv2 test, and you don't need to go down that road.
Viral shedding can still occur through the healing process, however in clinical research it has been noted that shedding does not necessarily occur everyday a lesion is present. https://academic.oup.com/jid/article/198/8/1098/879583 That being said, given you've been together so long and that HSV-1 (which I assume this is, though HSV-2 can occur orally as well) is prevalent in 50-80% of the adult U.S. population - he may already be an asymptomatic carrier already. Hopefully Auntjessi jumps in and gives you more insight. From my tiny point of view, I would not put to much worry in all of this.