Never Too Late

It's not the worst thing in the world if you turn around tomorrow and tell him you just got your first outbreak- "it must have been latent" or "it happened once before years ago and I was just diagnosed now." It's possible that your boyfriends are just lucky so far, as it sounds like you're pretty responsible. But maybe the next time they won't be, right? Or, maybe they've been infected, and aren't showing symptoms yet. Or maybe they already have had an outbreak, but they're keeping it a secret from YOU!
If you have herpes, you know well how troublesome it is, and because the virus affects people differently, the ones who you might infect may end up with a much worse case than you've experienced. Then again, maybe it won't be a problem at all, and the person you pass herpes to might only have a flair up once or twice a year. Either way, If you think back to when you first contracted, I can bet you weren't too pleased, and you still wouldn't be thanking the person who passed it to you (assumedly) without your consent. Be aware that you run the risk of infecting your friends, family, niece, gym partner, etc. casually,if you aren't hygiene-conscious. That's not to say you should lock yourself in a closet; treatments make it easy to lead an almost normal life.. But comparatively, the risk of transfer is much higher through sexual contact, and obviously higher still when having unprotected sex.
If you don't tell him, i highly recommend using condoms at the very least- if your boyfriend is worth protecting then wear protection. If you do decide to tell him... Thanks, from Doc Hollywood I wish my ex girlfriend had told me.