I accidentally sent a topless pic to the wrong guy? Do I tell my boyfriend?

Anonymous
So, I was snapchatting dirty pictures to my boyfriend, and one of the more innocent ones actually made it to someone else as well. It was just a picture of me in my bra, without any face showing, thank god. The guy I sent it to, his name begins with A so he was at the top of my snapchat, so I think I must have clicked his name when I was swiping down on my phone to find my boyfriend's name?

I freaked out when snapchat said it was sending it to two people, and contacted the other guy to apologize. He has a girlfriend. He laughed and said it was no big deal, he knew it had been a mistake and closed it, and said he wouldn't tell anyone. Although I don't know him very well, he's been my social circle for about 8 years and I know he's a good guy, and wouldn't have saved it.

My problem now is, do I tell my boyfriend when he gets back from his holiday? I can't decide if telling him would make him unnecessarily uncomfortable, or if by thinking that I'm just being a coward. I don't know how to explain it in a way that won't upset him :(

Thoughts?
I accidentally sent a topless pic to the wrong guy? Do I tell my boyfriend?
10 Opinion