Husband feels Uncomfortable Kinky

My husband and I have been together for 8 yrs. We have gotten through the getting to know each others likes phase but he knows I like being tied up, hair pulled, etc. He likes the role playing which I’ve done for him a million times. We both initiate sex but I’m wondering how can I make him feel comfortable with my kinks? He hasn’t done anything, in forever, to play into my likes. I know he’s a submissive but SO AM I! Every time we talk about it he feels uncomfortable and I want to fix it.

When we first got together he bought a vibrator because he wanted to watch me. I just feel like since then, everything had changed. To give even more background, whenever we were together for about two years and I said that I wanted to have more sex, he took it as if he was doing something wrong and stopped altogether. I just want him to be comfortable with my kinks.