Do you think I could be depressed?

Let's take a look into my daily life: My two brothers may as well abuse me. I get angry easily. I can get very violent very fast (One time my girl scout leader took my phone away from me because my friend was looking at my wallpaper. I was so angry I ripped up four paper plated that were on top of each other and started clawing at my arm because I couldn't get my anger out without damaging something and there was nothing else there.). I tend to have dark thoughts sometimes which are sometimes about stabbing and I watch murder shows (I would NEVER murder someone if that's where you think I'm going with this). Today I was at a park with a few of my friends and there were a few guys from my school and grade there too. One was someone I might have been starting to like and we sit next to each other in math and flirt a lot. We were there for about an hour I guess and it's really hilly at the park we were at. One of my friends found a glitter ball on the highest part of the park, above the basketball court. Me and two other friends where going over to go see it and the person who found it dropped it down the hill by accident. I was the closet so I was going to go get it but it was in a mud puddle. This was at the basketball court. So I was just standing there, minding my own business trying to decide how to go about getting the ball without getting mud all over me. Then out of the blue a basketball comes and lands in the mud puddle and gets it all over me. In my hair, on my shirt, my arm, my leg, everywhere. I went to ask if any of my friends could come with me so I could get changed but they were all to busy with their happy non-mud filled lives. So I went home by myself, took a shower, had half a slice of pizza, and slept until about half an hour ago. Now I fell... empty. Like I'm not here. I refuse to cry event though that's the only thing I get when I try to feel. I don't know how else I can describe it. I've always felt like somethings missing inside. When I was younger I had a really hard time finding friends. I still kind of do. I think I have trust issues too because I have a really hard time believing people. But maybe that's because my best friend may as well be a compulsive liar. The only time I feel better is when I'm writing by myself in my room. I know that other people have problems far worse than mine but isn't there something in depressed peoples brains that makes them like this? I try to think of myself as observant and I notice more things and understand more things than other people my age. Compared to my friends I may as well be an enlighted monk. Do you think I could be depressed? Thanks for answering.