Yes, it is a common noun. It means, "The state or time of being a girl".
The abstract noun form of the concrete noun 'girl' is girlhood.
There is no abstract noun for the noun phrase 'friendly girl'. The word 'friendly' is an adjective describing the concrete noun 'girl'.The abstract noun forms of the concrete noun 'girl' are girlishness (a word for a quality) and girlhood (a word for a period in life).
common noun
girlhood
The cast of My Girlhood - 2011 includes: Yixiao Li as Fang Dan
Common
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Camel is a common noun.