Miley Cyrus and Justin Gaston

They spend a lot of their free time together, so it’s no wonder that last night’s goodbye is already taking a toll on Miley Cyrus and Justin Gaston.

The “7 Things” singer is heading to Georgia to begin filming for the Nicholas Sparks movie “The Last Song” while designing her new line for Wal-Mart and taping a new season of “Hannah Montana.”

And things don’t stop there for Miss Cyrus, as she has plans to go back on tour in September. - with Us magazine reporting that Justin will not be joining her on the road.

Shortly after the goodbye, the underwear model took to his Twitter page saying, “Haven’t been this miserable in a looong time.”