My advisor became an assistant professor nearly two years ago. I worked with him for one year but did not publish a paper, and he thinks my progress is too slow. He asked if I want him to assign a new PhD student on this project. I replied that this was not necessary; I had been slow due to personal factors but things were improving. But he did not seem to understand. After that, he completely ignored me and stopped funding me (though he never formally "fired" me). I also find our research interests are not a good match. The project he gave me requires something new to him and me, and I think that’s a hard problem which needs more time.
What should I do? I want to change advisor and don’t want him hate me. Should I go to his office directly to talk with him, because he did not reply me after I send him several emails. I am just afraid the bad relationship will influence my reputation in department. I do have a TA position through the department, so the lack of funding is not too much of a problem.