I have asked myself that question very often. When I feel like giving up, when I think there is no point in life, when I feel too depressed to do anything. To me, people are not necessarily the thing that keep me going. I love travelling, reading, discovering new things. I agree with Echos Myron that art and learning provide a purpose. So I live for all the books I haven't read, all the places I've never been to, all the movies I haven't watched. Making new holiday plans, planning to read a certain book usually makes me happy and energetic. So I live for that.