What happens?

1x07: Stefan explains his and Damon's past with Katherine to Elena. In 1864, they both loved Katherine, who then turned them into vampires. Meanwhile, Damon spends the день trapped inside the Salvatore house with Vicki. They feed off of each other and he changes her into a vampire. Stefan discovers this and attempts to persuade her to die instead of completing the transformation into a vampire by feeding on human blood. Logan uses the pocket watch that tracks down Вампиры and finds Stefan and Vicki in the woods. Logan shoots Stefan with a wooden bullet, thinking Stefan was attacking Vicki. Damon saves Stefan by attacking Logan. Vicki is overcome by the hunger and feeds on Logan, completing her transformation. Stefan tells Elena that Vicki has become a vampire, and Elena decides to keep his secrets, but not without ending their relationship. (wikipedia)

for the stefan/elena parts: stefan admits im a vampire and elena kinda gets scared and runs away, she find stefan in her bedroom and tries to run again but he says i would never hurt Ты and it was damon who killed all those people. they meet up for lunch the Далее день and she wants him to explain everything the world is so much different than she imagined. kinda things about vampires. stefan asks elena to keep this a secret and elena says she cant promise that. he takes her to see what use to be his Главная & talks about his past(flashbacks)...and tells her the ожерелье has vervain in it a herb so Вампиры cant compell her. she asks if he ever used his mind control on her, he сказал(-а) no.

they get back to the house and deal wit the vikki stuff. vikki ends up running away. stefan finds her. logan fell shoots stefan wit wooden bullets and as he is about to kill stefan damon shows up and kills logan. stefan gives damon his ring back and vikki drinks human blood. stefan comes back to elena and says that he couldn't stop vikki. Elena says he will keep stefan secret, but says that all of this is too much for her to handle then shes that she cannot be with him anymore. She runs inside closing the door and starts crying.

(this one is my summary)

*SPOILER*
If Ты want to know I'll tell you....


In the Далее episode Elena will continue to ask "What are you?" Stefan tells her he's a vampire and Elena runs away terrified... after a little while, she asks Stefan to meet up with her and explain the whole story. Eventually, at the end of the episode Elena decides that she can not be with him any еще and breaks up with him.