I am fierce?

Ok... Today I am fierce... That's my friends said about me.
Hey! Don't they know that I am ALWAYS FIERCE?

I am fierce. I always get irritated and annoyed by the people around me. Is just that I didn't scold out. I control myself. If I am back at home then, I sure will scold out loud. So, I just remain silence here. Silence. Shh..... And people commented on me for being fierce.
So, teach me, how do you control anger but at the same time not showing that you are angry.

Sorry lor... I am still learning... But I thought there is an improvement that at least I didn't scold people anymore?

"You are so quiet today. What's wrong?"

Ok. I want to clarify something here. Indeed, I am being very very quiet today. Not the usual NOISY amy. But, it is nothing related to being angry or irritated. I am just being tired ok? TIRED! yes, WEARY! whatever you want to name it. Haiz... Just being quiet also got fault one....

"You are like a bomb. So quiet and peaceful but who know you will suddenly explode? It's scary you know?"

Zzzzzz.................................

Nothing to say.. I am really tired these days....
Tests, quizess, empirical study, lab reports........................
How am I going to handle those? I am not stressed YET. But is kinda worry already.

Ok. I want to switch the topic a bit here.

Why I always need to be scare of that person? Everytime that person want to study, I will keep quiet and try not to disturb that person. I become so unlike myself with that person. Always think of his/her feeling. But then, when I want to study, didn't see him/her care about me also. Didn't see him or her think about what I feel. Am I really that unimportant? Not need to care what I feel?
Or I am not being fierce enough in front of him/her?

I know I cannot measure things like this. But, I am just seeking for a balance here. Don't forget, I am a Libra.