What more should I do?

Some days I really feel I made a huge mistake in continuing for PhD at Austin. The more I think about it the more I feel the decision is not right. It is not the PhD that is my problem or the work or the lack of money. I just don't know how to address my problem. If a person cannot just understand you all you can do is give up and it is exactly thats what I am doing. He even does not understand this. Well, what do you expect me to make changes as if I am loving it. No, I don't like it and so that is how it will come out. I don't know what to do and how to address this!