Re: Please help.. been thinking about this for days. don't want to hurt him
Low risk HPV can lead to genital warts
High risk HPV can cause cellular changes which could possibly lead to cancer
High risk HPV does not cause warts.
What makes you think the bump was a genital wart? Was it ever treated?
Since you and your current BF have been having unprotected sex, then you have each swapped strains of HPV. If he has had any partners before you, then if he presents with a wart it might be from his previous partner or you (assuming you had previously been exposed to a strain of HPV which causes genital warts).
I think it is important to tell ones sexual partner about all known STDs, and HPV (low and high risk) is considered an STD. Of course, more than 80% of women over 50 have had exposure to at least one (of more than 30) strain of HPV at some point in her life. It is the most common (and rarely known) STD.
I hope that answers your questions.