Thanks for your question and concern, Yes it is possible that may be you have transmitted HPV in your boyfriend as It is a sexually transmitted infection. As HPV is a sexually transmitted infection so many times it may remain in the system without showing any such symptoms and possibly it may result in decrease in the immunity of the body of patient. There are few other STI’s also like HSV so it will be better if your boyfriend go through tests for these also. There are not as such genital warts seen.This other STI’s are also responsible for symptoms likelumps on the penis. It will be better if you start using some sort of barrier protection to prevent such STI transmission. There are many options for this like condoms and many more. Take care.