Blowjobs

Soooo I have this guy who is not my boyfriend but it’s basically like we’re a couple cause I’m always around his family and his daughter. Like going on trips and shit. And we both said from the beginning the day we met that we weren’t goin to catch feelings. Which I’ve gotten them on and off ngl but for the most part I think I just like the attention lol. He’s 24 and I’m 20. He has a lot more experience than me in sex and in life in general. We’ve been having sex and knowing each other since early May 2018. And it wasn’t until recently that he’s told me that I don’t give blowjobs right and that he’s never cum good with me when I give him head. And I honestly had no idea because he would fake it. And other people that I had been with prior to him have always wanted me to give them head and have told me that I’m good at it ? So I’m just looking for some advice as to what I should do when giving him head? What works for you girls and your men? Thank you!