Honestly this is one of the things I've had to struggle the most with. But at the end of the day, they're just people. They won't eat you alive. Confidence will build slowly but, if you atleast try some of the tips, for atleast 4 weeks. You'll notice the difference yourself. I was too shy to greet the guests when they'd visit our home. But now I have enough confidence to greet them, have a small talk and then go do whatever it is I was doing.