My boyfriend can’t make me orgasm?

So me and my boyfriend have been together for some time and let me just say that I love when we conduct sexual activities. I love the head, his penis is very satisfying, everything he does feels wonderful even when he fingers me. But i NEVER organism. Out of all the Past guys I’ve been with only 1 has made me cum and it was only like once or twice. When i masturbate of course i can make myself fun several times. But my boyfriend now can never make me cum and I can tell sometimes it bothers him. What should I do?