Can you make you cum?
If the answer’s “yes”, then it’s faintly possible you have some psychological or physiological issue rendering you situationally anorgasmic, but chances are, your guy’s just bad at sex. And he needs your help to be better… show him what you like and how to push your buttons.
If the answer’s “no”, and it’s a state of affairs that frustrates or worries you, seek a professional’s advice at your earliest convenience.
(Note for most of my audience: “orgasm” or “cumming” is a pleasurable response to sexual stimulation that mature, upstanding women experience as they pursue personal fulfillment. So obviously, it’s a nonsense word that means nothing as far as you’re concerned.)