Hmm, this is probably good advice. Part of my problem is that my entire family is made up of people who are both 1) Passionate advocates of an American political tribe and 2) Not very sophisticated philosophically.
A common condition with geeks in general and aspiring rationalists in particular, I'd say.
I've recently been expanding my network of like-minded people both by going to the local meetups and also by being invited in a Skype group for tumblr rationalists.
I know that a feeling of alienation isn't conductive to meeting new people, so I'm not sure I can offer other advice. Contact some friends who might be open to new ideas? I'd offer to help myself, but I'm not sure if I'm the right person to talk to. (In any case, I've PM'd my Skype name if you do need a complete stranger to talk to.)