Sounds like you're closer to the
FW side of DFW, so I can't really speak for what goes on in the town of the cow.
That said, Y2Komics has a robust community. Also, there's Area 51 in Grapevine, Texas Toy Soldier in Addison, Comic Asylum in Richardson and Madness Comics in Plano.
Check out the DFW
40k Meet-Up Facebook page:
here