Rob and Kristen hang out, catch up, try not to be awkward

Robert Pattinson is trying to rebuild his friendship with Kristen Stewart.

The 'Twilight' hunk - who ended his four-year relationship with the brunette beauty in May following her 2012 extramarital fling with director Rupert Sanders - was spotted leaving her home in Los Angeles, California, on Sunday, where he reportedly tried to clear the air and assured her that he is not dating her 'Runaways' co-star and good friend Riley Keough.