<P> In the season finale' Graduation', he tries to give the cure to Elena, but Elena refuses, which tells him that there is no more sire bond . He gets shot by Vaughn with a bullet laced with werewolf venom, and almost dies, but Klaus comes back to Mystic Falls and saves him . At the end of the episode, Elena proclaims her love for him stating that of all the decisions she has made choosing him will prove to be the worse one . </P> <P> Not aware of Stefan's absence and Bonnie's death, Damon and Elena are having the time of their lives before Elena leaves for Whitmore college . College brings a lot of ups and downs to the on screen romance . Katherine begs Damon to protect her as she feels someone is after her, Damon by the help of Jeremy's vampire hunter instincts that Silas is possessing as Stefan . Silas gives Damon a crash course on why he looks like Stefan and tells where was he the whole summer, shocked to know about this he starts to search Stefan with the help of Stefan . Silas mind - controlled Elena to kill Damon but Elena resists it by thinking about her worries for Stefan . Both Elena and Damon, with the help of Sheriff Forbes, finds the safe where Stefan was drowning the whole summer, but only to find a dead body . Due to both Elena and Katherine having same nightmare of Stefan all three, Damon, Elena and Katherine search for Stefan . Damon finally finds Stefan inside a hut where he is tied up in the chair and Qetsiyah makes a link of Stefan with Silas which fries Stefan's brain . Qetsiyah reveals to Damon that his relationship with Elena is doomed . Damon and Elena take Stefan where both of them finds out that he has memory loss and can't remember anything . Damon, to make Stefan remember about his past life, gives him his journals and spends quality time with him . Jeremy tells Damon that Bonnie is dead and Damon finally tells Elena about Bonnie . At Bonnie's funeral, Damon consoles Elena . Damon wants to help Silas so that Silas can do a spell to swap his life with Bonnie as Silas wants to die . Silas had seen Qetsiyah going to the party therefore both Damon and Silas goes to the ball party at Whitmore College . Silas needs Damon to kill Stefan, so that he can get back his power . Stefan, after waking up, tricked Damon and snapped his neck . At Salvatore's mansion they bring a desiccated Silas, to trade Silas's life with Bonnie he must become mortal (witch). The only way is by the cure so Elena and Damon calls Katherine who has the cure in her blood and after she arrives her blood is drained by Silas, but still Katherine lived . Amara is then awakened and revealed to be the mystic anchor . She then cures herself of her immortality by feeding off Silas . </P> <P> At the beginning of season 6, Damon is still trapped in the 1994 snapshot with Bonnie, forced to relive the same day over and over again . As the season progresses, the duo meet Kai Parker who's provides them with clues on how to get back home . In a truly selfless act, Bonnie manages to send Damon back while she remains in 1994 with Kai . Back home, things aren't as Damon expected them to be . Elena has compelled her memories of their time together and moved on . After a few initial set backs, Damon sets his mind to wooing her back . </P> <P> As the season progresses, Elena falls for Damon all over again as they search for a way to free Bonnie and she becomes a large part of his support as his good friend Liz Forbes becomes more and more ill with cancer . Kai, who escaped the Prison World without Bonnie and merged with Luke, has absorbed some of Luke's qualities and is now moved by guilt to help free Bonnie . With his help, he, along with Damon, Elena, and Jeremy, are able to visit the Prison World and remind Bonnie that there is still magic residing in Qetsiyah's headstone in Nova Scotia . </P>

When do elena and damon start dating in the vampire diaries