Yes, you do.
Go to the City Hall and get a Petition for Order of the Court - fill out the relevant section 1.6.3 pertaining to "Forced Marriage - Under 18".
You can get married at 14 in most places with the consent of you parents.
No
Alabama: If either of you are under 18, you will need a certified copy of your birth certificate. Both parents must be present with identification, or if you have a legal guardian they must be...