I Just Wanna Ask a Question

I just wanna ask a question,  
Is the word "SACRIFICE"just for girls?  
Not go out — you are a girl,
Not take the better one — you are a girl.

I cried and cried but they had no answer,  
To why a girl sacrifices it all —  
The place where she grew,  
The reality she trusted the most,  
And herself, her feelings — just for others' happiness.

Is this all the life a girl lives?  
Is a girl really born to live for others?