The 'Twilight Saga' star has moved out of the Los Angeles home he shared with Kristen Stewart following her admission she cheated on him with married director Rupert Sanders and has reportedly left friends worried by sharing his woes with fellow guests at the hotel where he is temporarily staying.
One pal told The Sun newspaper: "Robert has resorted to asking strangers out to keep him company.
"He went out for drinks with a woman staying in his hotel and he told her it was 'ridiculous' he had nobody to talk to."
The 26-year-old hunk has also been spending a lot of time alone trying to forget his relationship difficulties.
The source added: "He's been spending most of his days off just playing computer games."
After both Robert and Kristen moved out of their Los Angeles house, friends fear they won't be able to repair their damaged relationship.
A source said: "I'm not sure they'll be able to recover from this. [Robert] is heartbroken and angry.
"Kristen really loves Rob more than anything. He's all that matters to her right now."