it sounds a little like warts, but there's not enough information to give a very accurate guess. the fact that they're flesh colored and only burst blood and are clustered in one spot and their location sounds like warts. it doesn't sound like herpes. hpv can take months or even years before warts show up, but it's usually a few months, so you could have easily gotten it before your girlfriend, if you were sexually active.
Sounds suspicioius. Check it out with a blood test.
If it matters, the girl is a virgin, but we have had skin to skin contact.