Summarize:

Texas law has specific regulations as to whom can marry someone legally in the state. Those who qualify: A retired judge of a municipal court and a retired judge or magistrate of a federal court of Texas; a justice of the Court of Appeals or Supreme Court; judge of the Criminal appeals; judge of the district, county, and probate courts; judge of the county courts at law; judge of the courts of domestic relations; judge of juvenile courts; and retired justice or judge of those courts or current or retired justice of the peace. Others qualified to marry people in Texas are a licensed or ordained Christian minister or priest, a Jewish Rabbi, or a person who is an officer in a religious organization authorized by the organization to conduct the marriage ceremony. Seems obvious, but, yes, you have to actually attend the ceremony and so does your partner or you won't be able to get married in Texas. The exception is if you or your future spouse is a member of the United States military who is stationed in another country in combat or another military operation. After the ceremony concludes, the person who conducts the marriage should record the date and county where the ceremony was performed on the license, and return it to the County Clerk who issued it no later than the 30th day after the date the ceremony is conducted. To be married in Texas, you need to have the marriage ceremony before the 90th day after the date your marriage license was issued. If you try to get married after that, you won't be able to do so because the marriage license will be expired. Be aware that you have to wait 72 hours after obtaining the license to have the ceremony though. There is an exception for military personnel. The 72 hours is waived if you go through the State of Texas approved marriage education class as a couple and have a completion certificate.
Find someone appropriate to marry you. Attend the ceremony, unless you meet the military exemption. Follow the time limits.