Orgasms and cumming

My husband and I have been together for 4 years all together and have been havung sex together since we met. Thw sex we have is amazing and we both explore with our aex life to see what we like and I love it. I have no problem building up to an orgasm but it seems to not show up and if it does nothing... happens.. Like.. it almost seems like I'm unable to fun or squirt and he'll ask if I'm gonna cum fir him and I try but I just cant. Even when I'm rubbing one out I can feel the build up then nothing. Anyone else? Any ideas?