you seem to be like most people. You have your mouth shut and your eyes dead, and you just think. There is nothing wrong with this you just need to learn how to talk a bit I guess, and at the same time people have to accept that you are always thinking. One thing I do more than any one else I know is think about the little things and learn about anything, and now all my friends are amazed at how I can give input about any topic and can talk about almost anything. What you need to do is just start talking, it doesn't matter the topic, hell with my friends we talk about love, compassion, philosophy, games, school anything and everything. So you should be able to do the same. I guess if you want help we need more information. Age, groups, what you do when others talk, what you think about instead of talking, if it is just another topic in ur head or if u have some reason for not saying anything. A topic is anything just remember that .