it's good you're aware and want to avoid disease. on the other hand, more than half the adult american population has herpes, according to most studies. some even estimate numbers up to around 75 or 80%, and i imagine it's similar in other places around the globe. so, unfortunately, a lot of people have this. whether you want to forgo a relationship based on it is up to you. personally, i'd way prefer dating someone with oral herpes over genital, but obviously no herpes at all would be preferred.
are you an ass? no. are you a little overcautious? perhaps.
Another word for Herpes Simplex Type I is "cold sore."
People usually only get them occasionally. I only get them when I'm seriously ill, which is probably why they're called "cold sores" because people tend to get them when they have a cold - perhaps due to their immune system being down.
You can treat cold sores with a number of over-the-counter products, including tea tree oil.
The odds of you getting a cold sore in your life are pretty high if you kiss people. At all.
"Sentiment without action is the ruin of the soul." - Edward Abbey