I have two daughters ages 14 and 17 that want to live with me

[susanmommm]

Hello, My two girls want to live with me.  My 17 year old already does and now the 14 year old wishes to also.  The father and step-mother have custody now.   I have been getting the girls every other week(not weekend only) for the past 2 years.   I want to know if I need an attorney in order to change custody.  Is there any type of form I can show to a judge and avoid the legal fees.  I live in Georgia.  I have one more daughter that wants to live with me as well..she is 13 and believes(as I do) that she must be 14 before she has any rights.   Any help from you all will be greatly appreciated.