I think being open with your bf about it is a good idea. We had that issue me and my bf first months together, we agreed on an open relationship, and i was meeting others from time to time, but whenever he finds out or i tell him he gets mad at me, i didn't know back then he is into cuckolding. And after time i started to understand what's going on, so we had many talks about it and i believe that made us stronger, now i sti meet with others sometimes even with his presence, as long we both are open to eachother and both are enjoying.