THE FRIENDS THAT SHOW UP UNDERNEATH YOUR PROFILE PICTURE ON FACEBOOK?

I actually do think that it is a coincidence. I just opened my profile and looked at the people on the top of the list, and I don't think I have visited those people's profiles. They are definitely not the people that I frequently look up. Facebook has very strict privacy issues and they do not in any way expose someone's browsing history, including someone looking up someone else. I wouldn't worry about it. Now if he had photos up on facebook with this girl, then there would be a problem.