Bf won’t go down on me

My boyfriend and I have been dating for almost 9 months and he’s gone down on me twice and I’ve had past experiences with oral and they all said I taste good, I haven’t changed my diet or anything and I shower everyday so I know I’m clean. I give him regularly because genuinely I just like to please him but he won’t go down on me. He won’t kiss me down there or anything, like am I missing something? What do I do? I’ve asked him before and he says he doesn’t like the taste but that’s the taste of a vagina.