Y’all, I need advise

So, first of all I wanna say hello, second of all:

I’ve been with my SO 8 years, and I’ve always been into BDSM even tho I never mention it but he kinda knew.

Last night he finally did what I wanted him to do, with only a hint, telling him I wanted to be controlled and like, seriously, been kinda rude and all, which he did, and I thought he enjoy it, and he even said it was so amazing and told me he always felt like he had also been curious about it, but he never knew how to start, like I know TMI but I kid you now, he didn’t even told me or anything we were laying down and he got on top of me and told me to spit on his d*ck and suck it and that did it for me, I finished right then and there, but afterwards, like after all the adrenaline was over, he kind of changed with me, I told him he didn’t have to do it if he’s not into dom, and he said he is, and how he’s experiencing new things with me (this was my first time too, but I knew I was into it before) but then he said he didn’t want to do It like that often cause then we’ll get bored of it, but he got distant with me, any advice? Please and thank you