orgasm during sex

I've slept with three guys, all of which have never made me orgasm during intercourse, oral or just using their hands. But I've orgasmed before and it's only when I do it myself. My current boyfriend is also the third guy I've had sex with and he thinks he isn't pleasing me when I don't orgasm but I'm trying to explain to him he does please me and he's not doing anything wrong but he's just mad. Idk what to do because I can't force myself to finish during sex. I try telling him it's something we just have to keep on trying to do but I'm not getting through to him and I don't know what to do