As season one conclude , Rachel finally confess her love for Ross , having learned of his feelings for her from Chandler , only to find that he have already begun dating another woman , whom she resent . However , Ross eventually choose Rachel over his girlfriend Julie ( Lauren Tom ) , and the couple date for the remainder of the second season . However , their relationship rapidly begin to deteriorate towards the end of the third season after Rachel quit her job at the coffeehouse in favor of working in fashion . While Rachel become increasingly preoccupied with her new job , Ross grow jealous of her companionship with her coworker Mark ( Steven Eckholdt ) , ultimately culminating in their break up on their one @-@ year anniversary following a series of heated arguments and disagreements .