First, you have to pass the test for common-law marriage (it's more than just 'living together').
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Is common law marriage recognized in Alabama?
Yes.
What is sufficient to constitute common law marriage in Alabama?
"A valid common law marriage exists in AL when there is capacity to enter into a marriage, present agreement or consent to be husband and wife, public recognition of the existence of the marriage, and consummation." Waller v. Waller, 567 So.2d 869 (Ala.Civ.App. 1990). See also, Hudson v. Hudson, 404 So.2d 82 (Ala.Civ.App. 1981).
Alabama Attorney General - FAQs and Tips
If you are common-law married, then you have to get divorced, as if you were married in front of the judge at the courthouse.