Honestly, you need to just be open and ask. My boyfriend and I have been dating for over 3 years now and to stop any jealously or insecurity we just ask each other about new people who are mentioned. It's not controlling or crazy. I am currently spending a volunteer year in Spain so if I mention a guy's name a little too often, my boyfriend will just ask oh who's this? Then I can tell him all about it. If i have nothing to hide, then I can share it with him. That's the way we see it. No one tells the other to not see that person, nothing it controlling about it. But if someone comes up a little too often, yeah we just ask!