Yeah, I think that might have messed things up for you. Maybe you can get a Jar of Potent Friendship, wait for breakup/betrayal moodlets to run out (or blast everyone involved with a Moodlet Manager, if you have it), and set them back up again just to break them up the old-fashioned way? Or is there anyone who's maxed out social networking enough to set up relationships, and could set up them again for a breakup?