After vying for Rebecca's affection for 1.5 seasons, Greg Serrano left the show (and with him, Santino Fontana). He came back for season 4 (played by Skylar Astin) originally for a school project, and then decided to stay to run his dad's old restaruant (and maybe to try to win over Rebecca once again). #crazyexgirlfriend #gregserrano #skylarastin #jumperguy17