Overreacted

I'm feeling so blue. Like torrent of burdens fall on me. As if I can't live no more. I'm sad. How could this happen? Hmmm, this afternoon, my brother came back from his work to home. He's home, wandering around and then he talked to mom that he just got a client or sort of. This client wanted to buy a computer. He thought that this was a good chance for him, you know a good business. Ok, back to my home, my brother knocked my door. He said he wanted to take something.
I was annoyed because of this disruption. I walked out and didn't say any word to him. He came out a moment later, holding a monitor in hands. "Wait, what's he doing?". I stood by his side, waiting for a good explanation for this. He didn't give a damn.  "Why do you take it ?" I asked. He replied, "I'm going to sell it.". I kept silent, and blanked.  There goes my beloved monitor. It accompanied me for this past two months. Now, it's gone. what a fate. I should let go. I had no choice, the monitor was his. I'm terribly sad because of this, am I over reacted?
I'm sitting here in this very noisy internet cafe. Facing a tube like monitor, I mean the old monitor, which is white in colour, very big, and stuff. I don't have any strenght to describe it precisely. I remember the last words of my brother before he left with my monitor. He said, "use the old one!". You know what this mean? It means I have to use the old monitor which I don't like anymore. This is totally unfair. I want justice. Why do adults keep doing what they want to do, without giving a thought that this could hurt somebody. Yeah I know I'm just too much. Over reacted.