As such most of the general population have
it. Cold Sores are quite common and nothing to be ashamed about.
It could quite possibly be Canker Sores as well. If your worried then go and see your doctor. Don't stress yourself out over it, stress has been known to cause those kinds of breakouts. If your boyfriend has them then the best bet would be to wait until the sores have healed before you kiss again as they are contagious.