<P> Blaine Anderson is introduced in the episode "Never Been Kissed" as the lead soloist of the Dalton Academy Warblers a cappella musical group . He meets Kurt Hummel (Chris Colfer), a member of the rival glee club New Directions . When Kurt asks if Blaine is gay, Blaine matter - of - factly says he is; Kurt tells Blaine that he is being bullied at school for being gay, and Blaine reveals that he too was harassed at his old school, so he transferred to Dalton Academy, which enforces a no - bullying policy . Blaine befriends Kurt, and helps him stand up to his tormentor, Dave Karofsky (Max Adler). When the threats and violence against Kurt reach a dangerous level, he transfers to Dalton Academy . He falls in love with Blaine, who is initially oblivious to Kurt's feelings even as their friendship grows . Blaine enlists Kurt's help to serenade his crush Jeremiah (Alexander Nifong), the assistant manager at a local Gap store . Jeremiah is subsequently fired and rebuffs Blaine . Kurt confesses his feelings, and Blaine tells Kurt that he cares for him, but is terrible at romance and does not want to risk damaging their friendship . </P> <P> Kurt and Blaine attend a party hosted by New Directions co-captain Rachel Berry (Lea Michele). The attendees play spin the bottle, which results in Rachel and Blaine kissing . In the aftermath, Blaine wonders whether he might be bisexual, and goes on a date with Rachel . When she kisses him again while they are both sober, he concludes that he is indeed gay, which relieves Kurt . </P> <P> After learning of Kurt's ignorance of sexual matters, Blaine visits Kurt's father, Burt (Mike O'Malley), and prompts him to give Kurt "the talk" about sex . As the Warblers prepare to perform at the Regional show choir competition, Kurt admits that he is jealous of how many solos Blaine gets . At a subsequent group meeting, Kurt arrives late and announces that the group's mascot canary is dead; he sings "Blackbird" in honor of the bird . While Kurt is singing, Blaine has a revelation, and later tells Kurt that he reciprocates his feelings and kisses him . At Regionals, the two sing a duet of "Candles" by Hey Monday . The Warblers lose to New Directions, but while Kurt is very disappointed, Blaine tells him that even though they lost, in reality, they won each other which makes losing Regionals worth it . After Kurt transfers back to McKinley, he invites Blaine to be his date at his junior prom in "Prom Queen"; both are shocked when Kurt wins Prom Queen due to having received an overwhelming number of unwanted write - in votes in the secret balloting . Karofsky, the Prom King, leaves to avoid dancing with a guy in the traditional dance between King and Queen, and Kurt dances with Blaine instead . After Kurt returns from Nationals in New York, he and Blaine admit their love for one another . </P> <P> In the first episode of the third season, "The Purple Piano Project", Blaine transfers to McKinley High at the beginning of his junior year to be closer to Kurt, who is a senior, and joins New Directions . He later auditions for the role of Bernardo in the school musical West Side Story, so as not to compete against Kurt who wants to play the male lead, Tony, but is cast as Tony himself . In the episode "The First Time", Blaine is pursued by Sebastian Smythe (Grant Gustin), a new Dalton Academy Warbler . Kurt and Blaine meet up with Sebastian at a gay bar, Blaine gets drunk, and afterward tries to get Kurt to have sex with him in the car . Kurt refuses, they have a fight, and Blaine decides to walk home . After the West Side Story opening night, they apologize to each other, and decide to go to Blaine's house . They are later shown in bed together, apparently having just had sex for the first time . When New Directions and the Warblers informally compete in "Michael" to determine which club can perform Michael Jackson's music at the upcoming show choir Regionals, Sebastian throws a slushie containing rock salt at Kurt, but Blaine interposes himself and is hit in the eye; his cornea is badly scratched and requires surgery . His eye heals, and he is back in time for New Directions to defeat the Warblers at Regionals . Blaine's older brother Cooper (Matt Bomer), a successful actor in commercials, visits Ohio, and the two achieve a rapprochement . Blaine's relationship with Kurt is later strained when Kurt text - flirts with a boy he met while preparing for his NYADA audition, and by Kurt's eagerness to leave for New York after graduation, which would separate the two at least until Blaine graduated the following year . The two patch things up, the glee club wins at Nationals, and the pair is still a couple at the end of the school year, though Blaine is still uneasy about the prolonged physical separation facing them . </P>

What episode of glee does blaine and kurt start dating
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