Non-orgasmic

So, when my bf & I have sex... I get REALLY close to having an orgasm. But I NEVER do. I’ve been with other people but none of them were able to get me close. With my current bf, I climax.... and then right when I should finish.............. I laugh. And it’s so embarrassing for us both because it makes him feel so insecure but I can’t help it. I’ve never came, and I always laugh and it’s not like it’s just one laugh. I can not stop laughing and nothing is funny. It’s kind of aggravating 😂😂