Be sure you password protect your computer. Don't post any photos that anyone who knows you could recognize. Don't drop information about yourself. I suppose the small southern town is OK, but no more than that. If you ARE going to come out to people, do it on your terms, not have it be some accident of the internet.

Be sure no one sneaks up behind you while you're on your computer.

Beyond that, I think many of us live a "double life" to some extent. Oz is right, of course, that most people, vanilla or not, keep bedroom secrets, but this is a sliding scale. I think people generally assume that other people's bedroom secrets are similar to their own. They allude to them; women of a common generation sometimes share them; men joke about them. If you fall outside the perceived norm, it can get lonely and your "personal space" can feel more isolated. It's hard to be out with the girls, and they get all drunk and giggly about their guys, and you can't really share that. It's a barrier to intimacy.

Yes, that sucks, but that's life. A lot of us are lucky to have a RL partner who shares our interest, and perhaps a few RL friends, met at munches or parties or on the internet, but many of us find community, and conversation, mostly online.

Try Fetlife and look for parties and munches in the nearest large city to your town. Try to hook up with the under-35 group nearest to you. Try to make at least a few real life friends and don't just live online. Will you still feel isolated in certain ways from your community? Yeah, probably.