Boyfriend has only made me “come” once in our 11 month relationship.

Title pretty much says it all. The only time he has made me orgasm it was more of like a half-ass orgasm. It wasn’t a full orgasm. It didn’t feel right. It felt like I reached the point right BEFORE the point of completion and then it just went away. He comes every single time we do anything sexual. But I never do. Every time we fuck I’m always left wanting more. He will give me head and it feels good — I always say right there or don’t stop, but I never finish. Do I just take too long? I don’t understand.