Elena had been about to step in front of Damon protectively to keep Elphie from hugging him. Of course, then Damon hugged Elphie and Elena just stared in shock. And the smile. What if Damon fell for Elphie?! That wasn't okay!
"Fine. I'll just go home on my own." With that, the intoxicated brunette stormed out of the pub. Sure, it was childish, but she was so completely wasted that she didn't care that she wasn't being mature. Her feelings were hurt.
Once outside, Elena tripped over her feet and winced. Trying to get up and failing, Elena just sulked and went to the wall and pulled her knees to her chest. This sucked.