She left me and I haven't talked to her in 18 years but we never got divorce, because I could not find her.
Divorce / Separation Lawyer
You may be able to obtain a divorce in Colorado. However if your wife has never lived in CO then the CO Court will not have jurisdiction to determine property division and maintenance. You could obtain a divorce in the jurisdiction where your wife resides as well. Since neither of you live in Texas it is unlikely that the Texas Court's would take jurisdiction.