29F and 32M how do I fix the dead bedroom?

So I’m (29F) with my boyfriend (32M) for about two years. At the beginning we had a great sex life and couldn’t get enough of each other. I know it’s normal for this to lessen as time goes on but I just don’t want to have sex with him anymore. I have a very high sex drive and his is a little lower. But now when he initiates sex I’m just not into it. There’s no passion in the sex and it feels very “for the sake of it”. It was never really romantically passionate to be honest it was just sex. But now I’m like really craving more passion and like simple “I love you” when having sex. I don’t know how to have this conversation with him to be honest. He’s more avoidant attachment than I am so I’m at a loss honestly. Any advice?