There are several good veterinary technology programs in Texas.
You can find the whole list here: www.avma.org/education/cvea/vettech_programs/texas.asp
There are also some colleges in Texas that offer veterinary assisting certification programs. But be aware that this is not the same thing as a veterinary technology program and will not allow you to sit for the Veterinary Technician National Exam or the state board exam to be registered as a veterinary technician in Texas. There are a few of these veterinary assisting programs that will count towards your degree in veterinary technology but you need to be sure that the one you pick (if you go that route) does count towards a college degree should you decide to get a degree in veterinary technology.
You may also want to go ahead and get a job or volunteer at a veterinary hospital as a veterinary assistant prior to starting school just to be sure that this is really what you want to do. The job is often not what people expect.
If you have any further questions or just want to talk about the differenc options, feel free to contact me. I am the president-elect for the Texas Association of Registered Veterinary Technicians. www.tarvt.org