孤独成瘾浪瘾成性
[gū dú chéng yĭn làng yĭn chéng xìng]
'Addicted to Loneliness and Wanderlust' implies that solitude and a free-spirited wanderlust have become deeply engrained habits of life, expressing the joy, freedom, but also maybe an involuntary state from which one finds it difficult to extricate oneself.