I'm not sure anymore

So I always thought my boyfriend was into BDSM. He pretty rough in bed, chokes me, and all that stuff. Well today I bought a ball Gag and blind fold, thinking he'd love it. I was wrong. I tried playing it off like "we can still use the blindfold lol" and he goes "tbh the whole BDSM thing doesn't do anything for me. I'm indifferent about it" I have no clue what turns him on or what he likes to do anymore I plan on asking him but I'm still a lol upset for some reason.

Update:

I know what BDSM is btw I am into DDLG/BDSM, and I always got the vibe he was too. Turns out he just did it because I love it, and it turns him on to see me turned on