LOS ANGLES: Ben Stiller thinks being single at his age would be ‘’horrible’’.  The 48-year-old actor, who plays Walter Mitty in his new film ‘The Secret Life of Walter Mitty’, which he also directed, is married to actress Christine Taylor, and says struggling to connect with the world of romance through online dating like his character in the film would be his worst nightmare.  He told British newspaper Metro: ‘’It would be challenging for me to be in that situation, being single in your 40s and facing that responsibility - to have to communicate via social media.–EP