Tanushree Dutta has a bitter experience about her one-time friend Riya Sen. After this incident, would she make friends in Bollywood again? "It's not only about people in the film industry. It's about people anywhere, belonging to any industry. I agree there's such stiff competition in Bollywood that friends turn foes, but tell me one place in the world where this does not happen? I am an optimist and I can't stop making friends owing to one bad experience," she replies.