Dear @mike,
Welcome to the forum and thanks for sharing your story. Great to hear that you’ve been able to be supported by a specialist and that you know about your condition before any obvious liver damage has occurred.
Regarding when you were infected, the majority of people with chronic Hepatitis B are infected as babies or children through blood to blood contact. The infection can be asymptomatic for decades, so you may not have known you had it. There are other people who have struggled with similar issues and have discussed it elsewhere: Dealing with the diagnosis in a relationship, Wish I didn't know I was hepb positive before marriage and When/how to disclose hep b in a potential relationship?. I don’t have a specific answer for your situation, but you might find help there.
Thomas