From your report, this is very likely HSV 1 infection.
A one night stand 10 years ago was not likely to result in an HSV 2 infection but it is not impossible.
The swab test should have been typed – it wasn’t?
If this is a new infection, the blood test may not yet be positive. If possible at all, call and ask that the swab test be typed – they may still have it.
And if it is HSV 1, yes you can have sex without fear or him getting it genitally. is that 100% certain? No. Just highly highly unlikely
Terri