The infamous breakup of the much admired "Twilight" series ex-flame Robert Pattinson and Kristen Stewart has disappointed their fans enormously.

If you think heartthrob actor Pattinson has moved past his heartbreak, then it's a mistake. According to the new report, his breakup has led to a massive change in the star.

The "Twilight" series duo has dated each other for a long time before their breakup due to Stewart's indulgence in cheating. Unknown sources said he hasn't been the same since their breakup. He has turned into a partygoer and can be spotted at Los Angeles hottest party venues.

Earlier, Pattinson was an introvert guy who preferred spending time with his ex-girlfriend Kristen Stewart than going to a party.

Reports claimed the change began in "Twilight" star when Stewart cheated on him with Rupert Sanders, director of her film, "Snow White and the Hunstmen."

Sources noted Stewart's infidelity broke Pattinson's heart beyond repair.

"Kristen broke his heart, he has not been the same since she cheated," an insider told The Sun.

Fans and reporters may think that the "Twilight" actor has moved on since his ex-beau's betraying act. But is this change an attempt to get over the past that may be causing the star excruciating heartache?

The former couple was back for a brief time after the cheating scandal, but it didn't seem to work out as things for Pattinson had changed.

The star was recently spotted partying with Joe Jonas and Zac Efron while both were rumored caught up in drug addiction recently.

However, an insider revealed that Pattinson's next move in his career is quite crucial since his successful work as Edward Cullen should not pull down his upcoming roles.

He has been told to quit womanizing and partying and start focusing on his career. "Rob's team felt he needed a wake up call [and] that now is the time to get extremely serious about his career, even if that means quitting the womanizing and music making that have defined his life in Los Angeles so far," an insider told Radar Online.

The actor's recent appearances with dark marks around his eyes and red knuckles have been speculated to be a sign of some brawl that the star may have got into recently. His scruffy appearance is quite contrasting to his former self. But these are just speculations running wild in the grapevine.

Fans of the "Twilight" co-stars Pattinson and Stewart still hope that the situation cools down between the two and they move on for good.

Read more about Pattinson and Stewart:

risten Stewart Wants Robert Pattinson Back: Sends An Angry Email?