"Approximately 20 million people are currently infected with HPV. At least 50 percent of sexually active men and women acquire genital HPV infection at some point in their lives. By age 50, at least 80 percent of women will have acquired genital HPV infection. About 6.2 million Americans get a new genital HPV infection each year."

http://www.cdc.gov/std/HPV/STDFact-HPV.htm

I had a low-risk type before I was sexually active so it isn't a 100% STD. "The types of HPV that infect the genital area are spread primarily through genital contact." The operative word is "primarily".

I would maybe tell him about the cryosurgery and why I had to have it, etc. but let him do his own "worrying" about himself. I'd just be as open as I could be and ask him about himself and expect him to be open, etc.