TMI: I need tips 😓😓

Alright so this is a little confusing but I'll make it quick. Baaically, im good at blowjobs. I've been told, at least, that I am. My BF rants and raves to me about it. But he lasts SO LONG when I blow him that my mouth starts to go numb. i dont get it because when we fuck its like quick asf. He says when we fuck and he sees my boobs bounce he cant hold it in (which is fine) but I dont want to be that girl who never finiahea a blow job 🙃🙃. SO, tips? things that speed it up? things that drive YOUR man wild that i could use?