Is your RL relationship also with a Dom? Personally I could only handle one Dom at a time. I'd have a much easier time compartmentalizing one vanilla relationship with a BDSM one.
The thread is closed now (over 7,000 posts) but you'll find some good information about this in the Distance-Domination Support Thread. Compartmentalizing was not the central topic of the thread but I know from having read it that some of the frequent contributors managed two or more relationships.