Rob Pattinson and Kristen Stewart's relation may not stand the test of time unlike their "Twilight" characters. The attention surrounding their real-life romance with reel-life love interest has put a strain on their relationship.The Twilight heartthrob hopped a flight from Toronto to L.A. on July 23, and a fan snapped photos of him boarding the plane and hanging out in the airport lounge.Is Rob Visiting Kristen Stewart?

Rob looked first-class hot in jeans, a T-shirt, shades, and his signature beanie.

Rob, 27, was recently spotted kissing a mystery girl in Toronto, but maybe he decided to go home because he was missing his ex, Kristen Stewart, 23, who lives in L.A. Kristen clearly still has Rob on the brain, as she was seen hanging out at his favourite guitar shop in Tarzana.

Rob's latest fling, Riley Keough, also lives in L.A., so he could be going to visit her too. Rob and Riley, 24, have been quietly dating since June, but Rob still considers himself single.

Kristen and Robert Pattinson has entertained movie lovers with their passionate character portrayals, specifically that of Bella Swan and Edward Cullen (in Twilight) Even before their secretive romance began, Pattinson admits he was a fan of Stewart's body of work.

It's been a roller coaster time for Robert Pattinson and Kristen Stewart. Rumours about the status of their relationship have been constant since they got together in 2009, and speculation picked up steam in July 2012, when photos of Kristen kissing her Snow White and the Huntsman director, Rupert Sanders, surfaced. Since then, the Rob and Kristen romance watch has been heating up.

Although the couple have been broken up since six weeks, Rob can't stand being away from Kristen. Even though Rob was the one to call it quits with Kristen. A shocking new report claims that he thinks about Kristen all the time and actually called her before she left for Paris!

The actor has been reportedly "desperately missing" Kristen. There are times that he wants to text her but then he'll stop himself. But on June 27, Rob picked up the phone and called Kristen! They spoke for 42 minutes and it was a "tearful" conversation! Rob actually considered meeting up with Kristen but she was flying to Paris to attend the Chanel fashion show on June 30.

Robert Pattinson and Kristen Stewart share amazing bond of love both on -screen and off -screen. They may have gone through some problems over the time they got together, but we still have hope that with the passage of time these two can work through their issues and come out on top.

As time hurts time heels.