Cold sore

Hey guys so I get cold sores like once or twice a year. I haven’t had one in awhile but my bf just got his first one ever today. Could this be from me in the past of my cold sores??? Or no bc I haven’t had one in like a year.

Should I not kiss him at all when I see him even tho ik I get them?

Also is it a no oral sex zone at all with a cold sore?