I know I need to talk to him, and I'm going to tonight when he gets off work...I just have no idea what's going through his head right now. I'm assuming that's he's just got some misconceptions about the group like he did about me when he first found out. Hopefully I can get him to understand...
This would certainly seem to be the case.

I would add that he may also be worried that since he is inexperienced, you're attractive, and there are more experienced BDSMers at the meet that you might think twice about being with him?

Any new relationship is a bit volatile at first Throw in the complication of the lifestyle, and the learning curve can be more than a tad daunting.