It is most likely genital warts, which is caused by HPV. They often appear as skin tags, and can sometimes itch. HPV is a sexually transmitted infection, that will go away. It isn't a disease. The warts will either go away by your immune system fighting it off, or your Doc will prescribe you a cream to apply to them 3 nights a week. Your boyfriend may test negative for STD tests, but it's hard to know when a guy has HPV.
You need to see a Dr, bumps can be so many different things.