Maybe he's just not that into you?

So listen. My boyfriend and I have been together for around about two and a half years. On the more physical side of things, nothing is really happening. For me anyway. He's happy asking for me to pleasure him with my hands or my mouth, but on the topic of sex he clams up and laughs it off. I get that we are both virgins but I know it's not a nerves thing, or a religious thing (he does not follow any religion...) so the question is: is he just not attracted to me? 😔