Yes, Elena you need to let one go.
As various Vampire Diaries spoilers have revealed by now, tomorrow night's season three finale will take us back to sophomore year for Elena, Matt and company, before any sexy Salvatore brothers entered their lives. Heck, when these two were still dating!
What will dreaming about this time in her life force Elena to realize: she cannot string Damon and Stefan along, she cannot make the same mistakes she made in the past. Simply put: she has to let one go. Which will it be? You can vote now between brothers.
Other questions that come to mind based on this clip: when in the finale does it take place? Why is Matt looking over Elena? Why did Tyler and Caroline get a call from their parents? Why does Stefan rush to his ex in a panic?