My Secret Kink Since Divorce

I recently got divorced and started seeing someone new who doesn't know about my kink. I've always been into a bit of dominance and submission, but it's something I never talked to my ex-husband about. Last week, after we had our first date, I invited him back for coffee, and in the heat of the moment, I couldn't resist. He seemed open to it at first, but when things got more intense, he pulled back, looking uncomfortable. It was clear he wasn't into it. Afterwards, I felt awful, worried this would be a dealbreaker or that I had just messed up our chance at something real. I haven't brought it up since and feel so embarrassed. What if he thinks I'm some kind of freak?