How do you tell your boyfriend that you got STI from your Ex?? Please help.?

Girls and guys, i am in a very sensitive and difficult situation right now and need a truly helpful advice. Five years ago i was in love with one guy, who was my first man and correspondingly we had sex without condoms. Our relationship did not last long for various reasons (basically because he turned out to be a moron and disappeared like a villain). So we had sex only like three times, that was it. After that i did not have sex with anyone. Only several months ago did i meet a very very very nice guy, and we truly have a harmonious relationship now. He is very caring, attentive, loving, gentlemanly, treats me right, in a nutshell, makes me very happy. He does know that i had had only one man before him but we did not ever go into details how etc. The other day i went to doctor to consult regarding birth control pills, she asked me to some STI and other control tests and it turned out that i have STI (papillomavirus). I feel very very ashamed and guilty now, had i known it before i would have cured it first of course, but since i didn't have sexual life before and the virus did not show up it didn;t occur to me to consult the doctor before. we do use condoms with my current boyfriend (only once did we not use it), but we also have oral sex, so there is a risk that he also got infected. I have no idea how to tell this to him. I am afraid that i will lose him which i terribly do not want, but i am also worried about his health and want him to take control tests as well. There is a chance that he also got infected, though that might not be a case. How do you think he might react to this? what you boys think in this situation? is he likely to give up on me? what would be the best way of telling him? will he think bad things about me? Please help, i really feel very bad and guilty and afraid currently. I appreciate your feedback on this.