Selena Gomez is sad to miss Justin Bieber?

After finally admitting to be dating Justin Bieber, since everyoneknew that. Selena Gomez was spotted in NYC with a sad look,would miss Justin?
As we posted here, Justin and Selena have already traded tweetssaying "I miss you. " And for the popular gossip site, Hollywoodlife, the sadness of Selena is missing her boyfriend, Justin Bieber.
Selena is in New York for the promotion of their new single "Who Says", while Justin is in London, in company with Jaden and Willowto My World Tour.
What do you think Selena is really passionate and missing Justin or not?