Do you often feel alone in a strange city?

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Now I am working in the big,strange city of shenzhen in China,as everyone known,most of this city are from different city or even province,so we often feel alone or lonely. At least ,i have this feeling.I usually can't find a girl friend to go around on street with me ,or I can't find a person who can listen to me when I feel sad or happy. So I want to find a friend,but I don't know how to find a person who can be my friend!