I hate to say this, but you may have to parish shop. I just attended a lovely mass at a little Catholic Church in downtown Las Vegas. I wish I could attend here more often, but I think that this church serves mostly tourists like myself. I like the churches I've visited in Dallas, but this one I'll miss. I think that because so many people who fill the pews at this Church are from out of town, the priest is particularly welcoming, and it reminded me how important it is for people to feel at home when they come to the Lord's home.
One thing you have to realize is that you're in the South and the Catholic community may have a bit of a siege mentality. I know nuns in Dallas who are regularly accused of being minions of Satan by assorted fundamentalists. It gets to the point where you look for a Rosary or a Scapular before you approach someone, for fear of Catholic-bashing.
I know you said that you are shy, but if you could someone a moment of strength to approach the clergy, they may not realize how insular they seem. This sounds like a parish wary of strangers, and the regular members, clergy and lay ministers may have forgotten the simple act of welcoming. I think it's sad if that's the case, but maybe just you speaking up might rekindle the light at the door.
I hope that you've found this helpful and good luck finding a community; we all need one.
Anyway, for some reason I'm reminded of the words of the 13th century Sufi poet, Rumi, inscribed above the door of a Christian church in Shiraz, Iran:
Where Jesus lives, the great-hearted gather.
We are a door that’s never locked.
If you are suffering any kind of pain,
stay near this door. Open it.