He didn't get hsv from this encounter. Im not even convinced you have hsv. Far from convinced. I would retest and see what happens. If you decide to retest l, only have an igg test. No igm!!!
1.35 is very low. Think of the number as a confidence number. The higher the number the more sure the test saw the antibodies.
What you've read is incorrect. An open sore is more contagious. In the absence of symptoms, even if the virus is shedding most exposures won't lead to transmission. He was at no risk. It takes the virus penetrating the skin or mucous membrane. This takes friction (being massaged in)
Igg or igm test? Your very low numeric value could very well be a false positive. Any number under a 3.5 has a good chance of being a false positive. If your number was for an igg test you have a better than 50/50 chance this is a false positive. If it was from an igm test then completely disreguard it and get an igg test.
Hw was at no risk at all. Zero.
Now, what test came up positive for hsv and what was the numeric value of the test? This is very important as there are flaws in certain tests and posible false positives. If you don't have that info see if your dr can give it to you.