Are my too fat for a girl?

Look at my profile picture
I don't know someone said I should gain muscle on them
And that gave me the idea that
I have loose skin on my arms
And I need muscle to make them better
I'm only 14
And 5'2"
And 103 lb
So I'm NOT trying to gain weight
But wtf?
Updates
+1 y
Are my ARMS to fat for a girl **
I mean
Are my too fat for a girl?
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