I disagree with the previous post. You could be married, and therefore require a legal divorce.
First, Texas recognizes common-law marriage, which is discussed further in the article below. Second, depending on the facts in your situation, you could have a valid marriage in Texas. Texas does recognize marriages from other states. You probably need a consultation with an attorney at the very least.
My colleague, James Miller, is in Arlington and provides consultations. His contact information is:
Law Office of James Ryland Miller, PLLC
600 Six Flags Drive, Suite 400
Arlington, TX 76011
(817) 751-7145 phone