He never wants to eat me out...

So in the beginning of our relationship 2 years ago, my fiancé would eat me out and go down on me and holy crap it was phenomenal he is so good at it and I never came from head until he went down on me. He just slowly did it less and less and now he doesn’t do it at all, I literally have to beg him and it makes me feel bad. Earlier he was like “ugh you keep asking me, I’ll do it I guess” in a “lets get it over with already” tone and it makes me feel like complete shit. I miss when he actually did it without me asking or without hating it the whole time. I suck his dick all the time btw and every time before have sex, so there’s that also..I need help ladies, I tried talking to him and when I asked him if he was even likes eating me out he looked at me and got quiet. I don’t know what to do I just feel crappy about it.