Valentine’s Day approaches, but it seems consumers are being standoffish about online dating. The number of U.S. Internet users visiting dating Web sites is falling, says a report set to be released Monday. Last year, only 10% of Internet users visited at least one online dating site, down from 16% in 2005 and 21% in 2002, says the report by Jupiter Research. The decline in unique visitors hasn’t yet resulted in a decline in subscribers, the study found, but the trend likely will at some point, analysts say. Other research firms track the same trend. Traffic to seven of the...