Nice......NOT! :)
So, last boyfriend ended up giving me herpes. He had a cold sore, we stupidly had oral sex and I ended up with quite a nasty infection on my fanjo 
The GUM clinic said as it was HSV1 (i.e. oral herpes), and because it was HSV1 I would be unlikely to get another outbreak. If it had been HSV2 (genital herpes), that would have been bad news.
So what do I tell my new partner? Keep quiet and say nothing? or tell them I'm probably infected with something they may catch (and then they will run a bloody mile).