My man stops in the middle of it...

My man and I have been together for three months and he hasn't gotten me to cum yet. Tonight we were fooling around and he stopped in the middle of it to berate himself for not doing a good enough job, even though I was enjoying it and close to cumming! This isn't the first time this has happened and he's left me frustrated as hell. How can I make him understand he has to stop focusing on him not having made me cum yet and instead focus on actually making me cum in the moment????? BTW, we are not currently having vaginal sex, we did once before though. It is also not easy for me to cum, if you guys have any suggestions.😅😅😅😅