Honestly, I wouldn't worry or be upset. Everyone says they have 'preferences', but many girls (and guys) have relationships outside of their 'preferences'. Many times, preferences stems from an idea of a fantasy, not reality. I would be lying to say that there aren't girls who prefer taller men or who exclusively date taller men, of course there are, but there are plenty of women who prefer shorter men and there are even more women who don't care much for height at all (although it is fairly common for women to prefer to date a guy taller than them). Be confident about your height, you cannot change it and therefore there is no point worrying about it.