Being unhappy

Is it normal? To be so unhappy.. so often? Maybe it's because I'm a teen and I'm convinced that "no one" understands.. ? I don't quite know.
I do know, however, that I'm very unhappy at the moment. I spent all of thursday afternoon crying relentless into a box of girl scout Thin Mint cookies because I found a letter Alexis had sent me while I was packing things away.. How pathetic. I sometimes feel like.. Im waiting for something that I know is never going to happen.. or more so, that something is missing. All I know is that,right now, I feel more serious than any sixteen year old girl should ever feel. I just want to go home. 'm so tired of everyone pushing me around because they can. Yelling at me. Telling me that I'm stupid or wrong. Shut up, leave me alone. I wish I could scream and cry and punch right now. What is there to do when you feel like everyone around you is inadequate of sympathizing with your position?