Worried

Idk why or if it’s just me but I’m so scared to mention anything about Littles, BDSM, or sub/Dom play at all to my boyfriend. I’ve had one relationship where I learned from my boyfriend about it before that I had no idea what any of it was. Then after that I had a short fling with someone who is really in to the little/daddy play. I don’t always want to be sexual when I’m in the little space but I’m worried to even mention it at all because I’m worried he’ll be turned off by it. I’ve never fully regressed around him, But I do a little bit most of the time and he hasn’t had a problem with it. It isn’t something I necessarily need for us to work our sex is great and everything has been pretty fine but I don’t want to hide it or have to worry about it anymore. We’ve been together for year but is anyone else in this position or has been? How did it work out? I might just need a little confidence and get over myself but I’d want to hear others’ opinions