The 26-year-old actor was left devastated after discovering that 22-year-old Stewart, his girlfriend of four years, had cheated on him. He has not spoken to her since he left the couple's home here last month.
"Rob needed time to deal with his huge shock and upset, but he's agreed to face her. He's back in LA to promote his new film 'Cosmopolis'," contactmusic.com quoted a source as saying.
Now that he has all his friends around him, Pattinson has started feeling stronger. "He's incredibly hurt, but he still cares about Kristen and is actually worried about how upset she has been. A reconciliation is not on the cards, but they both know they need to thrash things out," added the source.
Pattinson has been keeping a low profile at Reese Witherspoon's estate in Ojai, California. Following the revelations, Stewart issued a statement saying how sorry she was and spoke about how much she loved Pattinson. Sanders, 41, is married to actress Liberty Ross and they have two children together.