I am in so much emotional pain right now. Please listen to my story.

I dated a guy for a very long time and was sexually active (unprotected) with him. Then I find out he cheated on me with 2 other girls (he told me he used a condom... Sometimes). After going to the clinic I was diagnosed with hpv and had visible warts. I got them treated and at the same time found a new boyfriend. We were dating while I was getting the treatment for my warts and so I decided not to tell him I had it bc I was embarrassed and really really afraid that he'd leave me (plus, they were getting treated!). Its almost a year now and all the warts are gone. I feel healthy and I havent gotten them since. But just recently I noticed a few bumbs on my boyfriends penis. They are really small and im still not sure, but they might be warts. But my biggest problem is, how do I tell him?? I feel like such a horrible person for doing this to the person I love so much. How do I tell him that I may have possibly given him genital warts when I thought I was cured?? Its a very stupid thing on my part, and I beat myself up everyday about it. I just dont know what to do.

Somebody, please, anybody. I am in so much need of advice. Im a horrible girlfriend and I would completely understand if he never wanted to see me again, but my main concern is getting him treated. So how do I tell him??