How to prevent cold sores?

I have hsv1 and sometimes it can stay off me for months and sometimes I get it almost every month. I have a first date tomorrow and I just woke up with a stupjd herpes on my lips.

I think it's been trying to get out for some time, but I managed to always catch it. This time I thought that the soft tingling isn't worth getting out of the bed and putting the salve on my lips before I fell asleep. I guess it would have been worth it after all :-\