While in Australia to promote her new flick, Water for Elephants, Reese Witherspoon has revealed that her co-star Robert Pattinson does, in fact, have a girlfriend. Chatting exclusively with DOLLY, Reese admitted that while millions of women have a crush on the 24-year-old actor, she isn't one of them. "He's my really good friend, so that would be totally weird," Reese said when asked if she ha…