Wondering where this came from?

I just received the phone call about my blood test telling me that I did in fact have herpes. My boyfriend is going to get a blood test, my doctor for some reason thinks he is the carry who gave it to me because the time frame in which my symptoms began. My concern is what if it was him who gave it to me but me who gave it to him or what if he DOESN'T have? Tracking the carrier of disease could be hard, especially if its from someone who has never showed symptoms or outbreaks, so they never knew they had it. We talked about speaking with past partners about it, but that is a very difficult thing to do for me. Any thoughts?