I can't suck my boyfriend's dick for shit

I think the fact that I can't give my bf a blowjob might began to be a problem in our relationship. So about a week ago he sent me this post

and I said amateur ofc. And he's like I don't think you would even qualify. When he said that it hurt my feelings but at the same time it was kind of funny to me. I replied lol and he's like I'm serious and I say I know you don't have to tell me. From there I didn't talk to him for a couple mins until he changed the subject. Yesterday we were talking about it and he said I'm always complaining. I can't even lie I do complain but I think that's because I don't like the fact that I don't know what I'm doing and then I'm not good at it and also I don't enjoy it because of those reasons. And today we tried it and he kept on making remarks about me complaining even though I wasn't doing any of it. I stopped twice in the second time he was like are you done? and in my head clearly I'm not done because you didn't cum yet. it got really awkward and we didn't talk to each other for like 10 minutes and he ended up leaving and going home. what do you think I should do please give me your best advice and don't be cliche like the romance novels.