The Twilight stars have recently been rumoured to be growing closer again following Stewart's revelation that she cheated on Pattinson with Snow White and the Huntsman director Rupert Sanders.
However, Pattinson's friends are concerned that he will be "hurt again" if he reconciles with Stewart, People claims.
"Rob was completely heartbroken and was saying there was no way he could ever forgive her," a source claimed. "But not speaking to someone that you thought was your end all, be all, is clearly harder than he expected."
Another insider added: "[Pattinson's friends] keep telling him he needs some time and space, but they all think they will be a couple again, maybe as soon as they are together for the Twilight promos."
The rumours come shortly after speculation suggested that the couple had decided to move back in together.
Kristen Stewart and Robert Pattinson's relationship - in pictures: