It looks like Robert Pattinson may be going through some difficulties in his romantic life ever since his breakup with Kristen Stewart.

Robert Pattinson Looks "Sad" On Set Of New Movie?

Insiders have claimed that the former Twilight star might feel like he can't trust girls anymore, and any chance of him and Stewart getting back together are extremely slim, though the feelings might still be there.

On Tuesday, Entertainmentwise posted some details that reportedly came from sources who revealed Pattinson's broken heart.

Kristen Stewart & Robert Pattinson Connect Through Fragrances?

"He would never get back with her; she disappointed him like no one before," a source reportedly said, referring to Stewart.

"He doesn't look at her the same anymore," the source continued. "But, Kristen that he thought he knew is still stuck in his head. This is why it is so hard for him to move on, he can't trust girls anymore."

There was another rumor that Pattinson may be dating pop star Katy Perry, but it's also possible they might just be hooking up. The two stars have allegedly kept in contact for a while, and may have been relying on each other after dealing with failed relationships.

"Rob and Katy have never stopped being in touch-- she loves the attention, but also thinks he's really sexy and funny," an insider supposedly told The Stir. "The texting stepped up in January when things started going bad between Katy and John [Mayer]. Rob's been a real shoulder for her to cry on. Since he's been single, though, the texts have hotted up-- she loves drunk texting him and they're always flirty."

Tags: Kristen Stewart Robert Pattinson