Still Waters Run Deep

I want to disappear. I feel so alone right now, and all I want to do is be alone. I'm surrounded by people, and I feel so much resentment and anger towards them, bitterness for being where I am, for taking my moments away from me. But I want to be social, I want recognition and admiration, but nobody sees the silent boy. I am invisible and I hate them for that as well, or do I hate myself? I'm not sure anymore.
I feel so responsible for maintaining everything, the happiness of Mary, my "social network", like it's always on my shoulders to make the effort, to make them happy, to make them like me. But it all feels forced, and it makes me, the me inside, feel even more alone because I am responsible. I can't bring anyone down, so I bring down myself. I sink farther and farther... I don't know how much farther I can go. I feel so lost, so completely lost in everything. Every day is like a switch between mania and depression, and I never know which is which. The smallest things just cause this swing of severe emotions.
All I want to be is home. To go inside my room alone and curl up alone and just disappear forever. I don't want to kill myself; I just don't want to exist anymore. I want to sink into the shadows and fade away into oblivion surrounded by the place that exists now only in my memory. Hate, rage and anger boil up and spill over onto everyone around me, and it is only through great effort that I keep these things bottled up, because I don't want to hurt people who don't deserve to be hurt. But I just want to break things, I want to destroy and kill and raze the entire world around me. Fantasies of sex and violence, though never together, fill my mind now. It makes me want to cry, because everything I though about myself doesn’t seem to exist anymore. I felt so together and in control, and now I feel like I'm struggling to float over and deep and dark sea and the temptation to sink into it, into the violence and anger and hatred and depression and nothingness that lies beneath them all.
Maybe I'm wrong, I do want to kill myself. But I am responsible for the emotions of my family, my girlfriend... I can make them happy or sad with a few lies or truths... or actions.
I don't know what to do but just try to float, try to rise above it all, or push it all below, it's all the same thing. But I have no outlet, I study and read and then go to class and then work and then study and sleep. That’s all I have now.
I want to run forever. From myself, from the world, from society. I want to lose myself on an endless beach and in the arms and sheets of endless women. In something eternally new, where I am reinvented and reborn and there is nothing behind me but the memories I choose. I don't want a history or a past. Just the ecstasy of the moment multiplied and played out into infinity of imperfect and amazing reflections.
But responsibility, society, pulls and tugs and forces itself onto my mind and my consciousness. My superego is strangling me, and I hate myself for it. I hate myself for hating it, for wanting what I want, for wanting what is... is wrong. I don't want to hurt, myself or others. Hurt involves a past, and memories. But in the constant paradise of my fantasies, in the constant newness, there is nothing but the now.
I am completely miserable, and it is my own doing. And I fear that I will be my undoing as well. Unless I take myself and my life into my own hands, into my own control, and end it on the term I choose, instead of the ones the world, and society, and my past will cause and choose for me.