Love this description of being on one's own in an article by Rachel Cooke:
Anything could have happened, and who cared if I had to live on thin air! The two feelings – the loneliness, and the thrill of being alone – were conjoined; I could no more have separated them than I could have bought a flat in Chelsea. And so my mood seemed to be always in a state of flux: one minute, I was on top of the world; the very pavements could provoke a smile. The next, I would feel as low as I ever had: overwhelmed, and desperate for home.