"It's been awful for his family and friends to watch him, under the glare of the world, next to this woman who cheated on him and broke his heart. Many held back while he was promoting the movie," thesun.co.uk quoted a source as saying.
"They realised he had a job to do and kept their opinions to themselves. But now they are making their feelings known. He has to ditch her. She is making him look like a total idiot," the source added.
Pattinson and Stewart started their relationship in 2008 while filming for the first movie of the Twilight series.