Elena must choose between Damon (Ian Somerhalder) and Stefan (Paul Wesley) in the CW drama's third season ender.
"The whole theme of the episode is about time and change, and making decisions and letting go based on the maturity that you gain from experiences good or bad," the actress told Entertainment Weekly.
Dobrev added that Vampire Diaries fans will "understand" Elena's choice between the Salvatore brothers.
"I think half of them are sitting at the edge of their seats hoping and praying that she'll choose Stefan, and the other half is doing the same for Damon," admitted the 23-year-old.
"But I think that, ultimately, they're going to respect her decision and understand where she's coming from and why she makes it."
It was recently confirmed that Daniel Gillies will reprise his role as Original vampire Elijah in the finale episode, titled 'The Departed'.
The third season of The Vampire Diaries concludes tonight (May 10) at 8/7c on The CW. In the UK, the series airs on ITV2.