My boyfriend hates going down on me

I know guys have restrictions and shouldn't be expected to be comfortable with everything when it comes to sex but it honestly bothers me that my boyfriend doesn't like to go down on me and won't give me an explanation. Although we haven't been together a long time, he says we need to be more steady. But if there's something I can do to better the experience for him, (flavored lube, etc.) I would love for him to talk to me about it and not be so shy with his preferences. I mean we've been intimate for a while. I think it's reasonable that he shed some light on his dislike for oral sex. Right??