How to tell the guy you’re seeing you want to be eaten out?

This is the guy I’ve been talking to for a year. I know he wants me to be his girl since he’s mentioned it but due to covid and not being able to see him that much in person he hasn’t officially asked yet. I’ve only been with him in person a few times and each time we’ve had sex. He’s the first guy I’ve been sexual with. He’s cum everytime but I haven’t and I just want him to go down on me but I’m wayyy to shy to tell him to so basically it’s just whatever he tells me to do during sex which I listen to him. I usually let him take control which I like but sometimes I end up riding him but he does NOT last long at all! It feel like 5-10 min each position and we do 2-3 positions each time we have sex. How do I tell him I want him to go down on me so I can get off too?

Edit: If I’m going to tell him, how should I say I wanna be eaten out without being so direct?