BDSM he wants it or he doesn't?

At the beginning of our relationship my boyfriend was alllll about BDSM. He said him and his ex gf were really big on it. I was new to it and enjoyed it. He would spank me hardcore, handcuff me to the bed, put a belt around my neck and tell me what to do, told me to call him daddy, etc. But after we moved in together he stopped and we just had vanilla sex. Which is great too, really. But he stopped with the daddy thing and everything which was kind of a bummer and sex hasn't been as exciting. He also hasn't wanted sex as much ever since.

Then one random day he kind of got in that mood again and pulled my hair and forced my head around when I was getting him a bj, and he accidentally pulled my hair so my neck turned when I wasn't expecting it and I got a really bad pulled nerve in my neck and I couldn't move it for a day without it hurting. He bought me roses and apologized, of course he didn't mean to hurt me and I forgave him and told him I really like it when he's aggressive with me just be a little more careful next time and he said ok. But after that he was never aggressive with me again.

Then today months later I was talking about how I enjoyed getting my tattoo. He said "so you liked the pain?" I said yeah it was soothing and I enjoyed it. He said "so should we try BDSM?" And I was thinking like... we did BDSM for months at the beginning of our relationship... did he forget? Lol. I said "you know I like that. Yeah lets do it." Then he casually changed the subject.

Idk. I'm really confused. Yes I will talk to him about it but wondering what you guys think from reading this??