If you frequently kiss someone prone to cold sores, what are the chances that you've contracted that strain of herpes?

It’s the cold sores that are from herpes simplex something or other, isn’t it?

Can one have this strain, contracted from kissing someone with cold sores, and never have any sores themselves?

My good friend just found out that her new boyfriend of several weeks almost always has cold sores… and now she’s sort of flipping about “having herpes.”