Who bites Elena in The Vampire Diaries?

Well, at the last point in ' The Reunion ', Elena is with Stefan, but she does have some feelings for Damon. I think she is a vampire at this point? I cant remember and I cant check because my friend has borrowed my book. But I think that's it. BUT, out soon, there is a new Vampire Diaries book called, ' The Return ' , So look out for that :)