Vera Wang celebrated her birthday with a host of family and friends at Nello the other night, including her two daughters and Barneys scion Gene Pressman. Also there was Arthur Becker, her husband of 23 years from whom Wang announced she was separating last year. He has remained working for her business, which he helped build into an empire. Onlookers at Nello speculated if Wang and Becker’s affectionate behavior could signal a reconciliation. But a friend told us, “They are still separated but remain good friends.”