I don't have anything to say around people, I'm practically incapable of small talk. Even if I do have something to say, I'm usually uncomfortable talking to people I don't know well, or even to people that I do know.
All of my hobbies are done alone, too, because I have no friends that I hang out with. It's actually incredible that I'm able to keep my mind occupied as much as I do.
I think a huge problem, not just with me, but with many other shy people is that we can't relate to other people because we are so different. Many of us just live different lives. Many of the things we do in life are anti-social (I don't mean that in a bad way, necessarily). Some examples for me, at least, are that I am 27 and have only been in one relationship and am a virgin. Whenever my friends ever brought up women or sex, I felt like i was on a different planet. Just talking to a woman besides at my flower delivery job, well I never talk to women besides at my flower delivery job, and the only reason I talk to women is so I can tell them they have a delivery and that other necessary stuff.
Another part of that is people my age are getting married or even having kids, and I'm nowhere near having either of those things happen. I'm not saying that is a bad thing, but it's all the more reason for me to not be able to connect with people because I'm so different.