It was a low–price point, diamond-heavy Valentine’s Day, jewelers told JCK—but not everybody felt the love.After speaking to nearly two dozen jewelers, JCK found many who echoed Michael Littman, co-president of Gary Michaels Fine Jewelry in Manalapan, N.J., who said he had one of his best ­Valentine’s days in years.The holiday had receded in importance for his store over the last few years, he says, but this year “turned out better than I expected—romance is back in the air.”While the balance tipped toward the positive, many jewelers still found it a challenging environment. Among the most-mentioned comments:Traffic was sporadic. Even retailers who scored big this holiday said the days leading up to Feb. 14 were suffused with nail-biting waits. It was a last-minute holiday for Providence Diamond in Providence, R.I., but that made all the difference. “We were really