You're blind. Ha ha! Just kidding.
There are many, many Texan Greeks around. In fact, there was quite a long thread not so long ago about Greeks just in the Houston area. I can think of six of us off hand, though I know there are more.
I am a Texan living in Atlanta, Georgia (originally from Houston). I work with the Gamma Iota chapter of Alpha Phi. My collegiate chapter was Epsilon Omega.
Relevant threads:
GreekChatters from Texas
Houston, TX
Texas GC'ers: Get Together?