Hsv2+.Outbreak 3 mo into unprotected sex w/partner. Had no sex relations 5 yrs prior. Ex penetrated once briefly w/condom. Both men Neg. How'd I get it?

It's unlikely. that you have had herpes prior to being with this new partner last 3 months, as you would have had at least one outbreak when you first got it. The key is unprotected intercourse, though it's been known to happen even with condoms on. Regardless of how your partner reacts to this news, it is hard to pin this on anyone else. You can be sure that both of you have it now though...