Bf Won’t Reciprocate Oral??

So rn I’m in my first relationship. We’ve been together almost 7 months & I’ve given him head since the very beginning & I do it basically every time we hang. My bf recently started fingering me but won’t eat me out cz he thinks it’s gross (btw he has never tried it). I’m saddd af abt this cz being eaten out is something I rlly want and have never gotten before. What do I do:(.... btw I’m 15 & hes 17