Robert Pattinson `worried about Kristen Stewart`

Washington: Robert Pattinson is worried about Kristen Stewart because of the ``stress`` she is under after admitting to an affair with married director Rupert Sanders.

While the British actor is refusing to meet her face-to-face, he is still concerned about his `Twilight Saga` co-star and offscreen love.

"Rob is still deciding what to do. He’s been talking to Kristen briefly on the phone every day but they haven’t met. He’s worried about how the stress of it all is affecting her and asks how she is - but he’s told her he’s not ready to hear her explanation of what happened," Contactmusic quoted a source as telling Closer magazine.

"He knows she’s going through as much hell as he is but he’s not sure he’s ready to see her or forgive her. Kristen has told him she doesn’t expect or deserve forgiveness, she just needs to see him to explain," the source added.