I want to be eaten out

My partner rarely eats me out and I would always ask and he’d always come up with an excuse or say next time. I eventually stopped asking and I guess he felt bad so he went down on me and I loved it. That was over a month ago. He hasn’t since and I really want to be eaten. Everything just felt different when I was. Idk wtf to do about this. How do you think I should approach this?