I had situation that resulted in what I would predict yours would. It’s not exactly the same but i think it may have a similar outcome.
I have a kink that I’m very scared of telling people about. I got super drunk and told my best friend about it. Now we are extremely close and basically are like Read more… brothers. My worry prior to this was similar to yours that if he knew about it then he would think me weird or not understand it and dislike me and exclude me.
Well he found out despite my best efforts. It was met with an unsurprisingly confused and I would say negative reaction. But dispute all of that it hasn’t effected our friendship at all and much to my surprise very little, well actually now I come to think about it nothing has changed.
Basically I think that if you are as close as you say you are, then in my opinion it really shouldn’t effect anything. People are entitled to their own opinions and they may not want to be involved or included or subject to it. But it shouldn’t effect your friendship/relationship in my opinion and experience.
I really hope this helps 👍