In Texas, alimony is actually called spousal maintenance. Chapter 8 of the Texas Family Code governs who qualifies for spousal maintenance. The general rule is that you must have been married for at least ten years, and not be able to earn enough money because of your previous devotion to the marriage and family. There are two exceptions, you need not have been married for 10 years if your spouse was violent towards you, or you suffered an incapacitating injury or illness during the marriage.
The length and amount of spousal maintenance will vary from case to case. In my experience as an attorney handling divorce cases, spousal maintenance is often a hotly contested issue. If you feel you are entitled to spousal maintenance or alimony, then you should contact a divorce attorney as soon as possible.