Robert Pattinson: Driven to Drinking by Kristen Stewart?

Will Ferrell is not the only person broken up by Kristen Stewart cheating on Robert Pattinson with Rupert Sanders.

Also really sad over the course of events? Robert Pattinson himself.

Reporter Carlos Greer tells People that the actor is "heartbroken and angry," while sources spill to the magazine that "he's been drinking and relying on friends to deal with the pain."

Other outlets, meanwhile, report that Pattinson has returned to the most dangerous habit of all: smoking.

The star is reportedly holed up inside Reese Witherspoon's vacation home in California and we'll mostly likely see him in public again on August 13 when Cosmopolis premieres in New York City.

As for the woman who destroyed Rob's spirit? Greer says Stewart feels terrible. She is "remorseful" and "beating herself up over this."