Has he seen a doctor about his rash? A rash around the eye should always be checked out, and if he thinks it's herpes, that needs to be checked immediately.
Squirting doesn't transmit herpes - direct skin to skin contact does. He wore a nylon mask. I don't know if it covered his entire face, but if it did, he didn't get herpes from you. Herpes doesn't go through fabric.
He may have herpes - I don't know - but I don't think you gave it to him.