Pattinson was left devastated after discovering his girlfriend of four years had cheated on him with Sanders and he has not spoken to her since he left the couple's Los Angeles home last month, reported Contactmusic.
However, the 26-year-old now wants to meet Stewart so they can discuss the future of their relationship.
"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'. Now he has all his friends around him, he's 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," a source said.