I think you should find someone to talk to! Go out and interact more. Talk to your coworkers - one of them might be into photography, and there you go, a new friendship. Talk to other photographers that you admire. Swapping tips might lead to friendships.

If you practice talking to people more often, then it won't feel like such a huge mountain to tackle when you feel you need to talk to someone to find someone to talk to.

Seriously, this sounds stupid, but even going to grocery stores late at night when they are empty - the check out people are bored to tears - they'll talk to you!

I think you're looking for the wrong thing. Don't learn not to talk, learn to talk more! You'll be happier if you do what you want rather than repressing it.