My bf is getting frustrated with me cumming.

So I don’t come easily but I’m very turned on by him. I asked him if he’s use a vibrator and he seemed down. Then when he started using it he ended up handing it off to me and fingering me intead. I was annoyed and used it on myself to cum. Then he didn’t use it anymore. Anytime he’s fingered me or ate me out, he asks if I’m close. Like I’ve tried explaining that it’s not him and that I just don’t cum easily. I just want him to actually use the vibrator so I’m not left frustrated