Somethings wrong in my life?

In my opinion I'm beautiful, smart, and fun to be around. But life isnt treating me fairly. I don't really like my friends, I had a terrible academic year because I lost motivation, and sometimes I stay in bed all day feeling depressed. I'm not feeling like that right now. I feel good. But again, sometimes, the whole world crashes down on my head. I want the best. When I don't get what I see fit, I malfunction like a bad computer on crack. I say malice things to people I love. It's because the pain, be it pathetic or legitimate, is very deep inside me. I did a bad job at explaining myself but please, what the hell do I do?