I think Travelinglady is so right. Sure meet with him go for lunch, or meet him for coffee. Get to know him again!!! That is the only way you will truly know if you want to start a more meaningful relationship. Enjoy each others company, spend time!!!
Even best friends do not need to or should not want to know the intimate details of any of your relationships. I would never ask about that kind of thing it is private!!!! So if you don't share, no one can tell!!!!
I also agree about Facebook, or any other social site. Geeeeezzee I see the most personal information on there. Personal info, arguments, personal feelings about others, should be no no's! Period.
Good luck to you!