South Portland’s Chelsea Roy has been sent home from ABC’s “The Bachelor.” Roy was initially cast as “ the villain” on the current season of the matchmaking reality show by TV critics before winning over some fans with her heartfelt comeback story. On “The Bachelor” and “The Bachelorette,” dozens of suitors try to convince the show’s central star to ostensibly fall in love with them over the course of several dates, with the field whittled down over time and the winner receiving a marriage proposal in the finale. The object of this season’s affection is single race car driver Arie Luyendyk Jr.