Elena is having enough trouble these days with the fact that the guy she loves is a vampire. That would be enough to permanently damage any relationship.

But on Thursday's new episode, she meets a new obstacle: Lexi.

As Stefan explains to Elena in a clip from "162 Candles," Lexi is an ancient blood sucker and nothing more than a close friend. But it's only natural for Elena to grow jealous of someone that has known Stefan for over a century.

Get a look at Arielle Kebbel in this role below, along with other photos from this week's episode:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.