Have you ever felt like this?

It is unbearable to feel empty. At home, and in your mind, you know exactly that you're not empty. You have feelings, you have thoughts and opinions. But you don't share a third of them with people outside of your house. Like you're in class, people have a debate. You don't dare speaking up. You have an opinion on the matter, and even if you're not even scared about what people would think about that, you don't feel like you can speak up. So, you have this useless conversation with yourself on your opinion, but you already know what's your opinion. And you don't give to others it, you don't share it and discuss it.
And people will believe that you have no personality, no thoughts, no opinions. You just think about yourself and you don't mind about the world you live in. You're just pointless and uninteresting. 
But you want so bad to be able to share your opinions with people. 
And you feel like you're going to blow up.