Orgasms

So I have been with a fair share of guys (too many for my age I realize). And I will sometimes see comments like "that position ALWAYS makes me orgasm". I have even told some friends that a couple guys have made me orgasm & I even tell myself that, just to make it more convincing in my head. But honestly I have never EVER received an orgasm from a guy. Sometimes I get really close but it has still yet to happen. I feel like something's wrong with me because of it. Any help?